Product
Vivo V15
Vivo V15
Xiaomi Mi Note 3
Xiaomi Mi Note 3
Battery
Charging - 18W wired, QC3
Type 4000 mAh, non-removable Li-Ion 3500 mAh, non-removable
Body
Build Glass front (Gorilla Glass 5), plastic back, plastic frame Glass front (Gorilla Glass 4), glass back, aluminum frame
Dimensions 161.2 x 75.9 x 8.5 mm (6.35 x 2.99 x 0.33 in) 152.6 x 74 x 7.6 mm (6.01 x 2.91 x 0.30 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 189.5 g (6.70 oz) 163 g (5.75 oz)
Comms
Bluetooth 4.2, A2DP, LE 5.0, A2DP, LE
Infrared port - Yes
NFC No Yes
Positioning GPS, GLONASS, BDS GPS, GLONASS, BDS
Radio FM radio No
USB microUSB 2.0, OTG USB Type-C
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 5 Corning Gorilla Glass 4
Resolution 1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density) 1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Size 6.53 inches, 104.7 cm2 (~85.6% screen-to-body ratio) 5.5 inches, 83.4 cm2 (~73.8% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer
Launch
Announced 2019, March. Released 2019, March 2017, September. Released 2017, September
Status Discontinued Discontinued
Main Camera
Dual - 12 MP, f/1.8, 27mm (wide), PDAF, 4-axis OIS 12 MP, f/2.6, 52mm (telephoto), AF, 2x optical zoom
Features LED flash, HDR, panorama Dual-LED dual-tone flash, HDR, panorama
Triple 24 MP, f/1.8, 1/2.8", 1.12µm, dual pixel PDAF 8 MP, f/2.2, 13mm (ultrawide), 1/4.0", 1.12µm 5 MP, f/2.4, (depth) -
Video 1080p@30fps 4K@30fps, 720p@120fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 64GB 6GB RAM, 128GB 6GB RAM 64GB 6GB RAM, 128GB 6GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Topaz Blue, Glamour Red, Frozen Black, Royal Blue Black, Blue
Models 1819 MCE8
SAR - 0.50 W/kg (head)     1.54 W/kg (body)    
Network
2G bands GSM 850 / 900 / 1800 / 1900 GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands 1, 3, 5, 7, 8, 38, 40, 41 1, 3, 5, 7, 8, 34, 38, 39, 40, 41
Speed HSPA, LTE HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  - CDMA2000 1xEV-DO
Platform
Chipset Mediatek MT6771 Helio P70 (12 nm) Qualcomm SDM660 Snapdragon 660 (14 nm)
CPU Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53) Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
GPU Mali-G72 MP3 Adreno 512
OS Android 9.0 (Pie), Funtouch 9 Android 7.1 (Nougat), upgradable to Android 9, MIUI 12
Selfie camera
Features HDR -
Single Motorized pop-up 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm 16 MP, f/2.5, (wide), 1/3.06" 1.0µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes No
Loudspeaker Yes Yes, with stereo speakers
  - 24-bit/192kHz audio