Product
Vivo Z1
Vivo Z1
Xiaomi Redmi Note 4X
Xiaomi Redmi Note 4X
Battery
Type Li-Ion 3260 mAh, non-removable Li-Po 4100 mAh, non-removable
Body
Build Glass front, plastic back, plastic frame Glass front, aluminum back, aluminum frame
Dimensions 154.8 x 75 x 7.9 mm (6.09 x 2.95 x 0.31 in) 151 x 76 x 8.5 mm (5.94 x 2.99 x 0.33 in)
SIM Nano-SIM + Nano-SIM Nano-SIM + Micro-SIM
Weight 149.3 g (5.26 oz) 165 g (5.82 oz)
Comms
Bluetooth 5.0, A2DP, LE 4.2, A2DP, LE
Infrared port - Yes
NFC No No
Positioning GPS, BDS GPS, GLONASS, BDS
Radio FM radio FM radio
USB microUSB 2.0, OTG microUSB 2.0, OTG
WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct Wi-Fi 802.11 a/b/g/n, Wi-Fi Direct
Display
Resolution 1080 x 2280 pixels, 19:9 ratio (~403 ppi density) 1080 x 1920 pixels, 16:9 ratio (~401 ppi density)
Size 6.26 inches, 97.8 cm2 (~84.2% screen-to-body ratio) 5.5 inches, 83.4 cm2 (~72.7% screen-to-body ratio)
Type IPS LCD IPS LCD
Features
Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass
Launch
Announced 2018, May. Released 2018, June 2017, February. Released 2017, February
Status Discontinued Discontinued
Main Camera
Dual 13 MP, PDAF 2 MP, (depth) -
Features LED flash, HDR, panorama Dual-LED dual-tone flash, panorama, HDR
Single - 13 MP, f/2.0, 1/3.1", 1.12µm, PDAF
Video 4K@30fps, 1080p@30fps 1080p@30fps, 720p@120fps
Memory
Card slot microSDXC (uses shared SIM slot) microSDXC (uses shared SIM slot)
Internal 64GB 4GB RAM, 64GB 6GB RAM, 128GB 6GB RAM 16GB 3GB RAM, 32GB 3GB RAM, 64GB 4GB RAM
  eMMC 5.1 eMMC 5.1
Misc
Colors Sapphire blue, Enamel blue, Hyun red, Enamel black, Black gold limited edition, Aurora Special Edition Platinum Silver, Champagne Gold, Matte Black, Hatsune Miku, Sakura Powder
Models V1801A0 -
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, 38, 39, 40, 41 - Snapdragon model
Speed HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps HSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/50 Mbps
Technology GSM / CDMA / HSPA / LTE GSM / CDMA / HSPA / LTE
  CDMA 800 & TD-SCDMA 1, 3, 5, 7, 8, 38, 39, 40, 41 - Mediatek model
Platform
Chipset Qualcomm SDM660 Snapdragon 660 (14 nm) Qualcomm MSM8953 Snapdragon 625 (14 nm)
CPU Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Octa-core 2.0 GHz Cortex-A53
GPU Adreno 512 Adreno 506
OS Android 8.1 (Oreo), Funtouch 4 Android 6.0 (Marshmallow), upgradable to 7.0 (Nougat), MIUI 10
Selfie camera
Single 12 MP, f/2.0, (wide), 1/2.8", 1.28µm 5 MP, f/2.0
Video 1080p@30fps 1080p@30fps
Sound
3.5mm jack Yes Yes
Loudspeaker Yes Yes
  - 24-bit/192kHz audio