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Smartphone comparison

Samsung Galaxy S25 Ultra vs Xiaomi 15

Compare cameras, battery, screen and everyday features.

Compared products
01Selected
Samsung Galaxy S25 Ultra

Samsung Galaxy S25 Ultra

  • 218 g.
  • About 120 Hz display refresh rate.
  • About 6.9 inch screen.
  • Qualcomm SM8750-AC Snapdragon 8 Elite (3 nm) processor.
  • Storage: UFS 4.0.
KSh 113,000In Stock
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02
Xiaomi 15

Xiaomi 15

  • About 120 Hz display refresh rate.
  • About 6.36 inch screen.
  • Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) processor.
  • Storage: UFS 4.0.
  • 90 W rated wired charging power.
KSh 104,000In Stock
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Samsung Galaxy S26 PlusKSh 116,000
Samsung Galaxy S24 UltraKSh 121,000
OnePlus 15 5GKSh 111,000
Google Pixel 9 Pro XLKSh 109,000
Google Pixel 10 Pro XLKSh 129,500
POCO F8 UltraKSh 106,000
OnePlus Ace 5 ProKSh 120,500
2 of 4 products

Our quick verdict

With the same Qualcomm Snapdragon 8 Elite processor and IP68 rating, the Samsung Galaxy S25 Ultra has a larger 6.9-inch screen, a longer cycle life (2,000 cycles) and a higher-resolution main camera (200 MP), while the Xiaomi 15 charges faster (90 W), charges faster wirelessly (50 W) and has a brighter screen for outdoor use and sharper selfies (32 MP).

Display

Samsung Galaxy S25 Ultra
About 6.9 inch screen
Xiaomi 15
About 6.36 inch screen

Performance

Samsung Galaxy S25 Ultra
Qualcomm SM8750-AC Snapdragon 8 Elite (3 nm) processor
Xiaomi 15
Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) processor

Charging

Samsung Galaxy S25 Ultra
45 W rated wired charging power
Xiaomi 15
90 W rated wired charging power

Battery capacity

Samsung Galaxy S25 Ultra
5,000 mAh battery
Xiaomi 15
5,240 mAh battery

Weight

Samsung Galaxy S25 Ultra
218 g
Xiaomi 15
192 g

Key differences

The main differences to help you choose.

Samsung Galaxy S25 Ultra

  • Higher-resolution main camera: 200 MP (vs 50 MP).
  • Larger 6.9-inch screen (vs 6.36-inch).
  • Rated for more charge cycles: 2,000 (vs 1,000).
  • More promised OS upgrades: 7 (vs 4).
  • Titanium frame and glass back (vs aluminium frame).
  • Video output to an external display over USB-C.

Xiaomi 15

  • Faster rated wired charging: 90 W (vs 45 W).
  • Faster wireless charging: 50 W (vs 15 W).
  • Brighter display: up to 3,200 nits (vs 2,600).
  • Higher-resolution selfie camera: 32 MP (vs 12 MP).
  • Lighter: 192 g (vs 218 g).

What matters most to you?

Choose any priorities

How each product answers the questions buyers ask most. Tick a topic to add it, untick one to hide it.

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6 priorities selected.
How each product answers the selected priorities
PrioritySamsung Galaxy S25 UltraXiaomi 15
Display6.9-inch OLED display, 120 Hz, 498 ppi6.36-inch OLED display, 120 Hz, 460 ppi
Camera200 MP main camera with OIS, plus a 3x telephoto camera50 MP main camera with OIS, plus a 2.6x telephoto camera
Battery capacity5,000 mAh battery5,240 mAh battery
Charging45 W wired, 15 W wireless charging90 W wired, 50 W wireless charging
Weight218 g192 g
SoftwareAndroid 15, 7 OS upgrades promisedAndroid 15, 4 OS upgrades promised

Detailed comparison

Explore the full specifications, section by section.

General

General specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
BrandSamsungXiaomi
ModelGalaxy S25 Ultra15
Announced2025, January 222024, October 29
Release statusAvailable. Released 2025, February 03Available. Released 2024, October 29
Model numbersSM-S938B, SM-S938B/DS, SM-S938U, SM-S938U1, SM-S938W, SM-S938N, SM-S9380, SM-S938E, SM-S938E/DS24129PN74G, 24129PN74I, 24129PN74C
SAR1.26 W/kg (head)     0.64 W/kg (body)—
SAR EU1.25 W/kg (head)     1.42 W/kg (body)0.99 W/kg (head)     1.00 W/kg (body)

Design

Design specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
Dimensions162.8 x 77.6 x 8.2 mm (6.41 x 3.06 x 0.32 in)152.3 x 71.2 x 8.1 / 8.4 / 8.5 mm
Weight218 g (7.69 oz)189 / 191 / 192 g (6.67 oz)
Build materialsGlass front (Corning Gorilla Armor 2), glass back (Gorilla Glass Victus 2), titanium frame (grade 5)Glass front (Xiaomi Shield Glass), aluminum frame (6M42)
Stylus supportStylus—

Display

Display specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
DisplayDynamic LTPO AMOLED 2X, 120Hz, HDR10+, 2600 nits (peak); 6.9 inches, 116.9 cm2 (~92.5% screen-to-body ratio)6.36 inches, 97.6 cm2 (~90.0% screen-to-body ratio); LTPO AMOLED, 68B colors, 1920Hz PWM, 120Hz, Dolby Vision, HDR10+, 3200 nits (peak)
Screen resolution1440 x 3120 pixels, 19.5:9 ratio (~498 ppi density)1200 x 2670 pixels, 20:9 ratio (~460 ppi density)
Display protectionCorning Gorilla Armor 2Xiaomi Shield Glass
Display featuresDynamic LTPO AMOLED 2X, 120Hz, HDR10+, 2600 nits (peak) DX anti-reflective coatingLTPO AMOLED, 68B colors, 1920Hz PWM, 120Hz, Dolby Vision, HDR10+, 3200 nits (peak)

Performance

Performance specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
ProcessorQualcomm SM8750-AC Snapdragon 8 Elite (3 nm)Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm)
CPUOcta-core (2x4.47 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPUAdreno 830 (1200 MHz)Adreno 830

Memory & Storage

Memory & Storage specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
RAM12GB / 16GB12GB / 16GB
Storage256GB / 512GB / 1TB256GB / 512GB / 1TB
Storage technologyUFS 4.0UFS 4.0
Expandable storageNoNo
Memory configurations256GB 12GB RAM, 512GB 12GB RAM, 1TB 12GB RAM, 1TB 16GB RAM256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM

Cameras

Cameras specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
Rear camera200 MP, f/1.7, 24mm (wide), 1/1.3", 0.6µm, multi-directional PDAF, OIS 10 MP, f/2.4, 67mm (telephoto), 1/3.52", 1.12µm, PDAF, OIS, 3x optical zoom 50 MP, f/3.4, 111mm (periscope telephoto), 1/2.52", 0.7µm, PDAF, OIS, 5x optical zoom 50 MP, f/1.9, 120˚ (ultrawide), 1/2.5", 0.7µm, dual pixel PDAF, Super Steady video50 MP, f/1.6, 23mm (wide), 1/1.31", 1.2µm, dual pixel PDAF, OIS 50 MP, f/2.0, 60mm (telephoto), 1/2.76", 0.64µm, PDAF (10cm - ∞), OIS, 2.6x optical zoom 50 MP, f/2.2, 14mm, 115˚ (ultrawide), 1/2.76", 0.64µm
Front camera12 MP, f/2.2, 26mm (wide), 1/3.2", 1.12µm, dual pixel PDAF32 MP, f/2.0, 21mm (wide), 1/3.14", 0.7µm
Rear camera featuresLaser AF, Best Face, LED flash, auto-HDR, panoramaLaser AF, color spectrum sensor, Leica lens, Dual-LED dual-tone flash, HDR, panorama
Rear camera video8K@24/30fps, 4K@30/60/120fps, 1080p@30/60/120/240fps, 10-bit HDR, HDR10+, stereo sound rec., gyro-EIS8K@24/30fps (HDR), 4K@24/30/60fps (HDR10+, 10-bit Dolby Vision HDR, 10-bit LOG), 1080p@30/60/120/240/960fps, 720p@1920fps, gyro-EIS
Front camera featuresHDR, HDR10+HDR, panorama
Front camera video4K@30/60fps, 1080p@30fps4K@30/60fps, 1080p@30/60fps, HDR10+, gyro-EIS

Battery & Charging

Battery & Charging specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
BatteryLi-Ion 5000 mAh· Si/C Li-Ion 5240 mAh - Global · Si/C Li-Ion 5400 mAh - China
Charging45W wired, PD3.0, 65% in 30 min 15W wireless (Qi2 Ready) 4.5W reverse wireless90W wired, PD3.0, QC3+ 50W wireless 10W reverse wireless
Wireless charging15W wireless (Qi2 Ready); 4.5W reverse wireless—
Reverse charging4.5W reverse wireless—

Software

Software specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
Operating systemAndroid 15, upgradable to Android 17, up to 7 major OS updates, One UI 9Android 15, up to 4 major OS updates, HyperOS 2

Network

Network specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
NetworkGSM / CDMA / HSPA / EVDO / LTE / 5GGSM / HSPA / LTE / 5G
SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time) - INT · Nano-SIM + eSIM + eSIM (max 2 at a time) - USA · Nano-SIM + Nano-SIM - CN· Nano-SIM + Nano-SIM · Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
2G bandsGSM 850 / 900 / 1800 / 1900; CDMA 800 / 1900 & TD-SCDMAGSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100; CDMA2000 1xEV-DOHSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 66 - International; 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 48, 66, 71 - USA unlocked1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66 - International; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66 - China
5G bands1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 66, 75, 77, 78 SA/NSA/Sub6 - International; 1, 2, 5, 7, 25, 28, 41, 66, 71, 77, 78, 257, 258, 260, 261 SA/NSA/Sub6/mmWave - USA unlocked1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 75, 77, 78 SA/NSA - International; 1, 2, 3, 5, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 80, 81, 83, 84, 89 SA/NSA - China
Network speedHSPA, LTE (CA), 5GHSPA, LTE, 5G

Connectivity

Connectivity specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
NFCYesYes
Bluetooth5.4, A2DP, LE5.4/6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Wi-FiWi-Fi 802.11 a/b/g/n/ac/6e/7, tri-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
PositioningGPS, GLONASS, BDS, GALILEO, QZSSGPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5)
RadioNoNo
USBUSB Type-C 3.2, DisplayPort 1.2, OTGUSB Type-C 3.2, Display Port, OTG
Ultra Wideband (UWB)Ultra Wideband (UWB) support—
Infrared—Yes

Durability

Durability specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
Water resistanceIP68 dust tight and water resistant (immersible up to 1.5m for 30 min) StylusIP68 dust tight and water resistant (immersible up to 1.5m for 30 min)

Features

Features specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
SensorsFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometerFingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
ColorsTitanium Silver Blue, Titanium Black, Titanium White Silver, Titanium Gray, Titanium Jade Green, Titanium Jet Black, Titanium Pink GoldBlack, White, Liquid Silver, Green, Lilac
Desktop modeSamsung DeX, Samsung Wireless DeX (desktop experience support)—

Audio

Audio specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
LoudspeakersYes, with stereo speakersYes, with stereo speakers
3.5 mm headphone jackNoNo
Audio featuresHigh-bitrate audio support24-bit/192kHz Hi-Res & Hi-Res wireless audio; Qualcomm XPAN (24-bit/96kHz audio)

Tests

Tests specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
PerformanceAnTuTu: 2207809 (v10) GeekBench: 9846 (v6) 3DMark: 6687 (Wild Life Extreme)—
Display1417 nits max brightness (measured)—
Loudspeaker-24.6 LUFS (Very good)—
BatteryActive use score 14:49h—
Performance benchmarks—AnTuTu: 2534638 (v10) GeekBench: 9419 (v6) 3DMark: 5980 (Wild Life Extreme)
Measured display brightness—1517 nits max brightness (measured)
Measured loudspeaker loudness—-25.7 LUFS (Very good)
Active use battery score—Active use score 16:28h

EU label

EU label specifications comparison
SpecificationSamsung Galaxy S25 UltraXiaomi 15
EnergyClass BClass A
Battery44:54h endurance, 2000 cycles63:26h endurance, 1000 cycles
Free fallClass A (270 falls)Class C (90 falls)
RepairabilityClass CClass C

Similarities

  • Both use the Qualcomm Snapdragon 8 Elite processor.
  • Both are rated IP68.
  • Both have optical image stabilisation.
  • Both support Wi-Fi 7.
  • Both use Bluetooth 5.4.
  • Both have NFC.

In summary

Get the Samsung Galaxy S25 Ultra if you want a larger 6.9-inch screen and a longer cycle life, or the Xiaomi 15 if you would rather have faster charging and faster wireless charging.

Back to compared products ↑

In-stock alternatives

iPhone 16 PlusFor Samsung Galaxy S25 UltraiPhone 16 PlusView product ↗OnePlus 15 5GFor Samsung Galaxy S25 UltraOnePlus 15 5GView product ↗POCO F8 UltraFor Xiaomi 15POCO F8 UltraView product ↗Google Pixel 9 Pro XLFor Xiaomi 15Google Pixel 9 Pro XLView product ↗

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