Product
Vivo Z3
Vivo Z3
Xiaomi Mi 5s
Xiaomi Mi 5s
Battery
Charging - 18W wired, QC3
Type 3315 mAh, non-removable Li-Ion 3200 mAh, non-removable
Body
Build - Glass front, aluminum back, aluminum frame
Dimensions 156 x 75.6 x 8.1 mm (6.14 x 2.98 x 0.32 in) 145.6 x 70.3 x 8.3 mm (5.73 x 2.77 x 0.33 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Nano-SIM
Weight 164 g (5.78 oz) 145 g (5.11 oz)
Comms
Bluetooth 4.2, A2DP, EDR, LE, aptX 4.2, A2DP, LE
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, DLNA
Display
Protection - To be confirmed
Resolution 1080 x 2280 pixels, 19:9 ratio (~400 ppi density) 1080 x 1920 pixels, 16:9 ratio (~428 ppi density)
Size 6.3 inches, 99.1 cm2 (~84.0% screen-to-body ratio) 5.15 inches, 73.1 cm2 (~71.4% screen-to-body ratio)
Type IPS LCD IPS LCD
  - 3D Touch display (128 GB, 4 GB RAM model)
Features
Sensors Infrared Face ID, fingerprint (rear-mounted), accelerometer, proximity, compass Fingerprint (front-mounted), accelerometer, gyro, proximity, compass, barometer
Launch
Announced 2018, October. Released 2018, October 2016, September. Released 2016, October
Status Discontinued Discontinued
Main Camera
Dual 16 MP, f/2.0, PDAF 2 MP, f/2.4, (depth) -
Features LED flash, HDR, panorama Dual-LED dual-tone flash, panorama
Single - 12 MP, f/2.0, 1/2.3", 1.55µm, PDAF
Video 1080p@30fps 4K@30fps, 1080p@120fps
Memory
Card slot microSDXC (dedicated slot) No
Internal 64GB 4GB RAM, 64GB 6GB RAM, 128GB 6GB RAM 64GB 3GB RAM, 128GB 4GB RAM
Misc
Colors Starry Night, Aurora Blue, Dream Powder Silver, Gray, Gold, Rose Gold
Models V1813BT, V1813BA 2015711
SAR - 0.77 W/kg (head)     1.01 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 / 1900 / 2100
4G bands 1, 3, 5, 8, 34, 38, 39, 40, 41 1, 3, 5, 7, 8, 38, 39, 40, 41
Speed HSPA, LTE HSPA 42.2/5.76 Mbps, LTE (4CA) Cat12 600/150 Mbps
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / EVDO / LTE
  CDMA 800 / 1900 & TD-SCDMA CDMA2000 1xEV-DO
Our Tests
Audio quality - Noise -89.6dB / Crosstalk -85.5dB
Battery (old) - Endurance rating 84h
Camera - Photo / Video
Display - Contrast ratio: 1294:1 (nominal), 3.276 (sunlight)
Loudspeaker - Voice 64dB / Noise 70dB / Ring 84dB
Performance - Basemark OS II 2.0: 2378Basemark X: 36240
Platform
Chipset Qualcomm SDM670 Snapdragon 670 (10 nm)Qualcomm SDM710 Snapdragon 710 (10 nm) Qualcomm MSM8996 Snapdragon 821 (14 nm)
CPU Octa-core (2x2.0 GHz 360 Gold & 6x1.7 GHz Kryo 360 Silver)Octa-core (2x2.2 GHz 360 Gold & 6x2.2 GHz Kryo 360 Silver) Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)
GPU Adreno 615Adreno 616 Adreno 530
OS Android 8.1 (Oreo) Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat), MIUI 10
Selfie camera
Features HDR -
Single 12 MP, f/2.0, (wide), 1/2.8", 1.28µm 4 MP, f/2.0, 1/3", 2µm
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes