Xiaomi 15 vs vivo X300 Ultra Specs Comparison

Availability

Officially announced
	Mar 30, 2026
Prices (MSRP)
12GB/256GB - €999 12GB/512GB - €1100

Design

Dimensions
6.00 x 2.80 x 0.32 inches 152.3 x 71.2 x 8.08 mm	6.42 x 3.02 x 0.32 inches (~0.63 inches with camera bump) 162.98 x 76.81 x 8.19 mm (~15.96 mm with camera bump)
Weight
6.67 oz / 189.0 g	8.18 oz / 232.0 g
Materials
Back: Glass	Back: Glass Frame: Aluminum
Resistance
Yes; IP68	Yes; IP69
Biometrics
Ultrasonic in-screen fingerprint	Optical in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
	Black, White, Soft Green

Display

Size
6.4-inch, 90.03% screen-to-body	6.8-inch, 90.04% screen-to-body
Type
OLED, 120Hz, HDR, 3200 nits	AMOLED, 144Hz, HDR
Resolution
2670x1200px, 20:9 ratio, 460 PPI	3168x1440px, 19.8:9 ratio, 510 PPI
Features
HDR support, Dolby Vision

PhoneArena Display Test

Bright Max (20% APL)
3175 (Excellent)	Untested
Bright Min
1.9 (Good)	Untested

Learn more on our PhoneArena Display Test Results page.

Hardware

System chip
Snapdragon 8 Elite SM8750-AB (3 nm)	Snapdragon 8 Elite Gen 5 SM8850-AC (3 nm)
Processor
Octa-core 2x4.32GHz Prime cores 6x3.53GHz Performance core	Octa-core 2x4.61GHz Oryon V3 Phoenix L 6x3.53GHz Oryon V3 Phoenix M
GPU
Adreno 830	Adreno 840
Memory
12GB/256GB (UFS 4.0) 12GB/512GB 16GB/512GB 16GB/1024GB	12GB (LPDDR5X)/256GB (UFS 4.1) 12GB/512GB 16GB/512GB 16GB/1TB
Storage expansion
not expandable	not expandable
OS
Android (14)	Android (16)

PhoneArena Performance Test

GeekBench 6 Single
3053	Untested
GeekBench 6 Multi
9261	Untested
3D Mark High
6220	Untested
3D Mark Low
4475	Untested

Learn more on our PhoneArena Performance Test Results page.

Battery

Type
5240 mAh	6600 mAh, Si - Carbon
Charging
Fast charging Qi wireless charging, Reverse wireless charging	Qi wireless charging, Reverse wired charging
Charge speed
Wired: 90.0W Wireless: 50.0W	Wired: 100.0W Wireless: 40.0W

PhoneArena Battery Tests

Battery Life Estimate

7h 18min

Browsing

17h 6min

Video

9h 49min

Gaming

11h 38min

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Triple camera	Triple camera
Main camera
50 MP (OIS, Laser and PDAF) Aperture size: F1.6 Focal length: 23 mm	200 MP (OIS, Laser autofocus, PDAF) Sensor name: Sony LYT-901 Aperture size: F1.9 Focal length: 35 mm Sensor size: 1/1.12″
Second camera
50 MP (Telephoto, Periscope, OIS) Optical zoom: Yes Aperture size: F2.2	50 MP (Ultra-wide, OIS, PDAF) Sensor name: Sony LYT-818 Aperture size: F2.0 Focal Length: 14 mm Sensor size: 1/1.28" Pixel size: 1.22 μm
Third camera
50 MP (Telephoto, Periscope, OIS) Optical zoom: Yes Aperture size: F2.0 Focal Length: 60 mm	200 MP (Telephoto, Periscope, OIS, PDAF) Sensor name: Samsung ISOCELL HP0 Optical zoom: 3.7x Aperture size: F2.7 Focal Length: 85 mm Sensor size: 1/1.4" Pixel size: 0.56 μm
Flash
Dual LED	LED
Video recording
8K UHD (30 fps), 4K UHD (60 fps), 1080p (960 fps)	8K UHD (30 fps), 4K UHD (120 fps), 1080p (240 fps) OIS, HDR
Front
32 MP Video capture: 4K UHD (60 fps)	50 MP Video capture: 4K UHD (60 fps)

PhoneArena Camera Tests

146

Overall

153

Photo

138

Video

N/A

Overall

N/A

Photo

N/A

Video

Learn more on our PhoneArena Camera Test Results page

Connectivity & Features

Bluetooth
5.4	5.4
WLAN
Wi-Fi 6,Wi-Fi 6E,Wi-Fi 7 Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax	Wi-Fi 6,Wi-Fi 6E,Wi-Fi 7 MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax
USB
Type-C, USB 3.2	Type-C, USB 3.2
Sensors
Accelerometer, Gyroscope, Compass, Barometer	Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor
Hearing aid compatible
	M3/T4
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, QZSS, Cell ID, Wi-Fi positioning
Other
NFC, Infrared	NFC, Infrared

Multimedia

Headphones
No 3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Multiple speakers	Earpiece, Multiple speakers
Screen mirroring
	Wireless screen share
Additional microphone(s)
	Noise cancellation

Cellular

5G Bands
n1, n3, n5, n7, n8, n28, n38, n40, n41, n48, n66, n77, n78, n79, SA, NSA	n1, n2, n3, n5, n7, n12, n20, n25, n26, n28, n38, n40, n41, n48, n66, n70, n78, n79, n80
LTE Bands
1, 3, 4, 5, 7, 8, 18, 19, 26, 28, 66	1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 25, 26, 28, 66
TDD Bands
34, 38, 39, 40, 41, 42, 48	34, 38, 39, 40, 41, 42, 43, 48
3G Bands
1, 2, 4, 5, 6, 8	1, 2, 4, 5, 6, 8, 19
SIM type
Dual Nano SIM + eSIM	Dual Nano SIM

Alternative variants

With 512GB internal storage

Memory	512GB

With 16GB RAM and 512GB internal storage

Memory	16GB/512GB

With 16GB RAM and 1TB internal storage

Memory	16GB/1024GB

Discover more

Full Specs Xiaomi 15 Specs PA Review Xiaomi 15 Review

Full Specs vivo X300 Ultra Specs