Product
Vivo V15 Pro
Vivo V15 Pro
Xiaomi Mi Mix 2S
Xiaomi Mi Mix 2S
Battery
Charging 18W wired, 24% in 15 min 18W wired, QC3 7.5W wireless (Qi)
Type 3700 mAh, non-removable Li-Ion 3400 mAh, non-removable
Body
Build Glass front, plastic back, plastic frame Glass front (Gorilla Glass 4), ceramic back, aluminum frame
Dimensions 157.3 x 74.7 x 8.2 mm (6.19 x 2.94 x 0.32 in) 150.9 x 74.9 x 8.1 mm (5.94 x 2.95 x 0.32 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 185 g (6.53 oz) 191 g (6.74 oz)
Comms
Bluetooth 5.0, A2DP, LE, EDR, aptX 5.0, A2DP, LE
NFC Yes (market dependent) Yes
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio FM radio No
USB microUSB 2.0 USB Type-C 2.0
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Display
Protection - Corning Gorilla Glass 4
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~404 ppi density) 1080 x 2160 pixels, 18:9 ratio (~403 ppi density)
Size 6.39 inches, 99.7 cm2 (~84.9% screen-to-body ratio) 5.99 inches, 92.6 cm2 (~81.9% screen-to-body ratio)
Type Super AMOLED IPS LCD
Features
Sensors Fingerprint (under display, optical), accelerometer, gyro, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, compass
  - Virtual proximity sensing
Launch
Announced 2019, February. Released 2019, March 2018, March. Released 2018, April
Status Discontinued Discontinued
Main Camera
Dual - 12 MP, f/1.8, (wide), 1/2.55", 1.4µm, dual pixel PDAF, 4-axis OIS 12 MP, f/2.4, (telephoto), 1/3.4", 1.0µm, AF, 2x optical zoom
Features LED flash, HDR, panorama Dual-LED dual-tone flash, HDR, panorama
Triple 48 MP, f/1.8, (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 13mm (ultrawide) 5 MP, f/2.4, (depth) -
Video 4K@30fps, 1080p@30/60fps 4K@30fps, 1080p@30/120fps, 720p@240fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 128GB 6GB RAM, 128GB 8GB RAM 64GB 6GB RAM, 128GB 6GB RAM, 256GB 8GB RAM
  eMMC 5.1 UFS 2.1
Misc
Colors Topaz Blue, Coral Red, Ruby Red Black, White
Models 1818, vivo 1818 M1803D5XA
SAR - 0.54 W/kg (head)     1.59 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900
3G bands HSDPA 850 / 900 / 1900 / 2100 HSDPA 800 / 850 / 900 / 1700(AWS) / 1800 / 1900 / 2100
4G bands 1, 3, 5, 7, 8, 20 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 27, 28, 29, 30, 34, 38, 39, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat12 600/50 Mbps HSPA 42.2/5.76 Mbps, LTE (3CA) Cat18 1200/100 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  1, 3, 5, 8, 38, 40, 41 - India CDMA2000 1xEV-DO
Our Tests
Audio quality Noise -93.4dB / Crosstalk -92.2dB Noise -93.0dB / Crosstalk -92.5dB
Battery (old) Endurance rating 92h Endurance rating 59h
Camera Photo / Video -
Display Contrast ratio: infinite, 3.806 (sunlight) -
Loudspeaker Voice 65dB / Noise 74dB / Ring 83dB Voice 68dB / Noise 70dB / Ring 81dB
Performance AnTuTu: 180774 (v7) GeekBench: 6527 (v4.4) GFXBench: 7.1fps (ES 3.1 onscreen) AnTuTu: 270814 (v7) GeekBench: 9158 (v4.4) GFXBench: 34fps (ES 3.1 onscreen)
Platform
Chipset Qualcomm SDM675 Snapdragon 675 (11 nm) Qualcomm SDM845 Snapdragon 845 (10 nm)
CPU Octa-core (2x2.0 GHz Kryo 460 Gold & 6x1.7 GHz Kryo 460 Silver) Octa-core (4x2.8 GHz Kryo 385 Gold & 4x1.8 GHz Kryo 385 Silver)
GPU Adreno 612 Adreno 630
OS Android 9.0 (Pie), Funtouch 9 Android 8.0 (Oreo), upgradable to Android 10, MIUI 12
Selfie camera
Features HDR -
Single Motorized pop-up 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm 5 MP, f/2.0, (wide), 1/4.0", 1.4µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes No
Loudspeaker Yes Yes