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vivo X21i vs vivo NEX Dual Display

 
Brief information about compared phones: vivo NEX Dual Display , vivo X21i

vivo NEX Dual Display 2018 year of release, cpu Octa-core (4x2.7 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver), screen 6.39", with resolution 1080x2340. Smartphone has 12 megapixel front camera and 12 megapixel main camera.

vivo X21i 2018 year of release, cpu Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53), screen 6.28", with resolution 1080x2280. Smartphone has 24 megapixel front camera and 12 megapixel main camera.

Display Technology Super AMOLED Super AMOLED
Touchscreen capacitive touchscreen capacitive touchscreen
Display colors 16M 16M
Screen size 6.39" inch 6.28" inch
Screen area 100.2 cm2 98.4 cm2
Screen format 19.5:9 (height:width) 19:9 (height:width)
Screen to body ratio 84.7% 85.0%
Screen resolution 1080 x 2340 px 1080 x 2280 px
PPI /points per inch/ 403 PPI 402 PPI
Camera and Video Rear camera, main 12 MP, Triple 12 MP, Dual
Camera specs 12 MP, f/1.8, 1/2.55'', 1.4µm, 4-axis OIS, Dual Pixel PDAF -2 MP, depth sensor -TOF camera, f/1.3 12 MP, f/1.8, 1/2.55'', 1.4µm, dual pixel PDAF -5 MP, f/2.0, depth sensor
Functions LED flash, HDR, panorama LED flash, HDR, panorama
Video 2160p@30fps, 1080p@30fps 1080p@30fps
Front camera, selfie 12 MP, Triple 24 MP, Single
Specifications Uses main cameras 24 MP
Performance Operating system OS Android 9.0 (Pie); Funtouch 4.5 Android 8.1 (Oreo); Funtouch 4
Chipset Qualcomm SDM845 Snapdragon 845 (10 nm) Mediatek MT6771 Helio P60 (12 nm)
Processor CPU Octa-core (4x2.7 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver) Octa-core (4x2.0 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
Graphics processor GPU Adreno 630 Mali-G72 MP3
External memory No microSD, up to 256 GB (uses SIM 2 slot)
Internal memory 128 GB, 10 GB RAM 128 GB, 4 GB RAM 64 GB, 6 GB RAM
Antutu 7 score 130256
GeekBench 4 Single Core 1497
GeekBench 4 Multi-Core 5759
Antutu 8 score 340355
General specs Release date 2018, December 2018, May
Dimensions (HxWxD) 157.2 Х 75.3 Х 8.1 mm 154.4 Х 75 Х 7 mm
Weight 199 g 159 g
Colors Polar Blue Black, Aurora White, Ruby Red, Night Purple
Battery 3500 mAh,  Non-removable Li-Ion 3425 mAh,  Non-removable Li-Ion
Approximate price 700 EUR 430 EUR
Communication and Connectivity SIM card Dual SIM (Nano-SIM, dual stand-by) Hybrid Dual SIM (Nano-SIM, dual stand-by)
Network Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2  CDMA 800 -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 19(800), 28(700), 38(2600), 39(1900), 40(2300), 41(2500) Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2  CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 2100 -4G - LTE band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 38(2600), 39(1900), 40(2300), 41(2500)
Speed HSPA 42.2/5.76 Mbps, LTE-A (4CA) Cat16 1024/150 Mbps HSPA, LTE
GPRS Yes Yes
Edge Yes Yes
Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot
GPS Yes, with A-GPS, BDS, GNSS Yes, with A-GPS, GLONASS
NFC
USB 2.0, Type-C 1.0 reversible connector, USB On-The-Go microUSB 2.0, USB On-The-Go
Bluetooth 5.0, A2DP, LE 5.0, A2DP, LE
Music and Audio Radio No FM radio
Headphone jack Yes Yes
Others Secondary display (on the back): -Super AMOLED, 5.49 inches, 1080 x 1920 pixels 32-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features Dop Sensors Fingerprint (under display), accelerometer, gyro, proximity, compass - Fast battery charging 10V/2.25A 22.5W Sensors Fingerprint (rear-mounted), accelerometer, proximity, compass - Fast battery charging

An overview of the main advantages of each of the devices

Reasons to buy NEX Dual Display
  • Screen 6.39"
  • Front camera 12 MP
Reasons to buy X21i
  • Screen 6.28"
  • Front camera 24 MP
  • External memory microSD GB