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Smartphone comparison

Xiaomi 15 Ultra vs Vivo X300 Pro 5G

Compare cameras, battery, screen and everyday features.

Compared products
01Selected
Xiaomi 15 Ultra

Xiaomi 15 Ultra

  • About 120 Hz display refresh rate.
  • About 6.73 inch screen.
  • Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) processor.
  • Storage: UFS 4.1.
  • 90 W rated wired charging power.
KSh 142,000In Stock
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02
Vivo X300 Pro 5G

Vivo X300 Pro 5G

  • 226 g.
  • About 120 Hz display refresh rate.
  • About 6.78 inch screen.
  • Mediatek Dimensity 9500 (3 nm) processor.
  • 16 GB RAM in this version.
KSh 149,000Out of Stock

Add to comparison

2 spaces available

Google Pixel 11 Pro 256GBKSh 141,000
Xiaomi 17 Pro MaxKSh 131,000
Samsung Galaxy S26 UltraKSh 124,000
Google Pixel 11 Pro XL 256GBKSh 132,000
iPhone 17 ProKSh 155,000
iPhone 17 Pro MaxKSh 162,000
Samsung Galaxy S24 UltraKSh 121,000
2 of 4 products

Our quick verdict

With the same IP68 rating and 50 MP main camera, the Vivo X300 Pro 5G has a bigger battery (6,510 mAh), runs newer Android 16 and has 5 promised OS upgrades and a longer cycle life (1,200 cycles), while the Xiaomi 15 Ultra has a sharper screen, charges faster wirelessly (80 W) and offers video output to a monitor over USB-C.

Display

Xiaomi 15 Ultra
About 6.73 inch screen
Vivo X300 Pro 5G
About 6.78 inch screen

Performance

Xiaomi 15 Ultra
Qualcomm SM8750-AB Snapdragon 8 Elite (3 nm) processor
Vivo X300 Pro 5G
Mediatek Dimensity 9500 (3 nm) processor

Storage

Xiaomi 15 Ultra
UFS 4.1
Vivo X300 Pro 5G
Dual UFS 4.1

Memory

Xiaomi 15 Ultra
Up to 16 GB RAM
Vivo X300 Pro 5G
16 GB RAM

Battery capacity

Xiaomi 15 Ultra
5,410 mAh battery
Vivo X300 Pro 5G
6,510 mAh battery

Key differences

The main differences to help you choose.

Xiaomi 15 Ultra

  • Sharper screen: 522 ppi (vs 452 ppi).
  • Faster wireless charging: 80 W (vs 40 W).
  • Newer Bluetooth 6.0 (vs 5.4).
  • Video output to an external display over USB-C.
  • Video output to a monitor over USB-C (DisplayPort).

Vivo X300 Pro 5G

  • Bigger battery: 6,510 mAh (vs 5,410 mAh).
  • Rated for more charge cycles: 1,200 (vs 1,000).
  • Newer Android 16 (vs Android 15).
  • More promised OS upgrades: 5 (vs 4).
  • Brighter display: up to 4,500 nits (vs 3,200).
  • Higher-resolution selfie camera: 50 MP (vs 32 MP).

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.

More topicsFewer topics
6 priorities selected.
How each product answers the selected priorities
PriorityXiaomi 15 UltraVivo X300 Pro 5G
Display6.73-inch OLED display, 120 Hz, 522 ppi6.78-inch OLED display, 120 Hz, 452 ppi
Camera50 MP main camera with OIS, plus a 3x telephoto camera50 MP main camera with OIS, plus a 3.7x telephoto camera
PerformanceQualcomm Snapdragon 8 Elite processorMediatek Dimensity 9500 processor
StorageUp to 1 TB storage512 GB storage
Battery capacity5,410 mAh battery6,510 mAh battery
Charging90 W wired, 80 W wireless charging90 W wired, 40 W wireless charging

Detailed comparison

Explore the full specifications, section by section.

General

General specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
BrandXiaomiVivo
Model15 UltraX300 Pro
Announced2025, February 272025, October 13
Release statusAvailable. Released 2025, February 27Available. Released 2025, October 17
Model numbers25010PN30GV2514, V2502A

Design

Design specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
Dimensions161.3 x 75.3 x 9.4 mm (6.35 x 2.96 x 0.37 in)161.2 x 75.5 x 8 mm (6.35 x 2.97 x 0.31 in)
Weight226 g or 229 g (7.97 oz)226 g (7.97 oz)
Build materialsGlass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frameGlass front (Armor Glass), aluminum frame, glass back
Additional body featuresAerospace-grade glass fiber—

Display

Display specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
Display6.73 inches, 108.9 cm2 (~89.7% screen-to-body ratio); LTPO AMOLED, 68B colors, 120Hz, 1920Hz PWM, Dolby Vision, HDR10+, HDR Vivid, 3200 nits (peak)6.78 inches, 111.5 cm2 (~91.6% screen-to-body ratio); LTPO AMOLED, 1B colors, 120Hz, 2160Hz PWM, HDR10+, HDR Vivid, Dolby Vision, 4500 nits (peak)
Screen resolution1440 x 3200 pixels, 20:9 ratio (~522 ppi density)1260 x 2800 pixels, 20:9 ratio (~452 ppi density)
Display protectionXiaomi Shield Glass 2.0Armor Glass
Display featuresLTPO AMOLED, 68B colors, 120Hz, 1920Hz PWM, Dolby Vision, HDR10+, HDR Vivid, 3200 nits (peak)LTPO AMOLED, 1B colors, 120Hz, 2160Hz PWM, HDR10+, HDR Vivid, Dolby Vision, 4500 nits (peak); Ultra HDR image support

Performance

Performance specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
ProcessorQualcomm SM8750-AB Snapdragon 8 Elite (3 nm)Mediatek Dimensity 9500 (3 nm)
CPUOcta-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)Octa-core (1x4.21 GHz C1-Ultra & 3x3.5 GHz C1-Premium & 4x2.7 GHz C1-Pro)
GPUAdreno 830Arm G1-Ultra

Memory & Storage

Memory & Storage specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
RAM12GB / 16GB16GB
Storage256GB / 512GB / 1TB512GB
Storage technologyUFS 4.1Dual UFS 4.1
Expandable storageNoNo
Memory configurations256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM

Cameras

Cameras specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
Rear camera50 MP, f/1.6, 23mm (wide), 1.0"-type, 1.6µm, dual pixel PDAF, OIS 50 MP, f/1.8, 70mm (telephoto), 1/2.51", 0.7µm, dual pixel PDAF (10cm - ∞), OIS, 3x optical zoom 200 MP, f/2.6, 100mm (periscope telephoto), 1/1.4", 0.56µm, multi-directional PDAF, OIS, 4.3x optical zoom 50 MP, f/2.2, 14mm, 115˚ (ultrawide), 1/2.76", 0.64µm, dual pixel PDAF TOF 3D, (depth)50 MP, f/1.6, 24mm (wide), 1/1.28", 1.22µm, PDAF, OIS 200 MP, f/2.7, 85mm (periscope telephoto), 1/1.4", 0.56µm, multi-directional PDAF, OIS, 3.7x optical zoom, macro 2.7:1 50 MP, f/2.0, 15mm, 119˚ (ultrawide), 1/2.76", 0.64µm, AF
Front camera32 MP, f/2.0, 21mm (wide), 1/3.14", 0.7µm50 MP, f/2.0, 20mm (wide), 1/2.76", 0.64µm, AF
Rear camera featuresLaser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)Laser AF, color spectrum sensor, Zeiss optics, Zeiss T* lens coating, LED flash, panorama, HDR, 3D LUT import
Rear camera video8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240/480/960/1920fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K@60fps, 1080p)8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240fps, gyro-EIS, 4K@120fps 10-bit Log, Dolby Vision HDR
Front camera featuresHDR, panoramaHDR
Front camera video4K@30/60fps, 1080p@30/60fps, gyro-EIS4K@30/60fps, 1080p@30/60fps

Battery & Charging

Battery & Charging specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
BatteryMarket-dependent versions: · Si/C Li-Ion 5410 mAh - Global · Si/C Li-Ion 6000 mAh - China· Si/C Li-Ion 6510 mAh (Global) · Si/C Li-Ion 5440 mAh (EU markets)
Charging90W wired, PD3.0, QC3+ 80W wireless 10W reverse wireless90W wired 40W wireless Reverse wireless Reverse wired

Software

Software specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
Operating systemAndroid 15, up to 4 major OS updates, HyperOS 3Android 16, up to 5 major OS updates, OriginOS 6

Network

Network specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
NetworkGSM / HSPA / LTE / 5GGSM / HSPA / LTE / 5G
SIM· Nano-SIM + Nano-SIM · Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)· Nano-SIM + Nano-SIM + eSIM (max 2 at a time) - International · Nano-SIM + Nano-SIM - China
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 - China; HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - International
4G bands1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66, 71 - International; 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66 - China1, 2, 3, 4, 5, 7, 8, 18, 19, 20, 25, 26, 28, 34, 38, 39, 40, 41, 42, 43, 48, 66
5G bands1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International; 1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79, 80, 81, 83, 84, 89 SA/NSA - China1, 2, 3, 5, 7, 8, 18, 20, 25, 26, 28, 34, 38, 39, 40, 41, 48, 66, 77, 78, 79 SA/NSA/Sub6
Network speedHSPA, LTE, 5GHSPA, LTE, 5G

Connectivity

Connectivity specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
NFCYesYes
Bluetooth6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 55.4, A2DP, LE, aptX HD, LHDC 5
Wi-FiWi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6/7, dual-band
PositioningGPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASSGPS (L1+L5), GLONASS (L1), BDS (B1I+B1c+B2a+B2b), GALILEO (E1+E5a+E5b), QZSS (L1+L5), NavIC (L5)
RadioNoNo
USBUSB Type-C 3.2 Gen 2, DisplayPort, OTGUSB Type-C 3.2, OTG
Satellite featuresTwo-way satellite communication (China model only)Satellite connectivity support (optional, market/region dependent)
InfraredYesYes

Durability

Durability specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
Water resistanceIP68 dust tight and water resistant (immersible up to 1.5m for 30 min)IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 1.5m for 30 min)

Features

Features specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
SensorsFingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometerFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass
ColorsBlack, White, Silver Chrome, GreenPhantom Black, Mist Blue, Dune Brown, Cloud White
Additional featuresTwo-way satellite communication (China model only)—

Audio

Audio specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
LoudspeakersYes, with stereo speakersYes, with stereo speakers
3.5 mm headphone jackNoNo
Audio features24-bit/192kHz Hi-Res & Hi-Res Wireless audio; Qualcomm XPAN (24-bit/96kHz audio)24-bit/192kHz Hi-Res audio

Regulatory

Regulatory specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
SAR (EU)1.00 W/kg (head)     1.00 W/kg (body)—

Tests

Tests specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
Measured loudspeaker loudness-24.1 LUFS (Very good)-24.8 LUFS (Very good)
Active use battery scoreActive use score 16:13hActive use score 12:45h
Performance benchmarks—AnTuTu: 2982875 (v10), 3533222 (v11) GeekBench: 10264 (v6) 3DMark: 7263 (Wild Life Extreme)
Measured display brightness—2113 nits max brightness (measured)

EU label

EU label specifications comparison
SpecificationXiaomi 15 UltraVivo X300 Pro 5G
EnergyClass AClass B
Battery58:58h endurance, 1000 cycles48:21h endurance, 1200 cycles
Free fallClass C (90 falls)Class B (180 falls)
RepairabilityClass CClass C

Similarities

  • Both are rated IP68.
  • Both have optical image stabilisation.
  • Both support Wi-Fi 7.
  • Both have NFC.
  • Both have an aluminium frame.
  • Both have stereo speakers.

In summary

Get the Vivo X300 Pro 5G if you want a bigger battery and newer Android 16, or the Xiaomi 15 Ultra if you would rather have a sharper screen and faster wireless charging.

Back to compared products ↑

In-stock alternatives

Google Pixel 11 Pro 256GBFor Xiaomi 15 UltraGoogle Pixel 11 Pro 256GBView product ↗Google Pixel 11 Pro XL 256GBFor Xiaomi 15 UltraGoogle Pixel 11 Pro XL 256GBView product ↗iPhone 17 ProFor Vivo X300 Pro 5GiPhone 17 ProView product ↗Google Pixel 11 Pro 512GBFor Vivo X300 Pro 5GGoogle Pixel 11 Pro 512GBView product ↗

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