Samsung Galaxy S8 vs vivo NEX A

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100

HSDPA 850, 900, 1700(AWS), 1900, 2100
4G network

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 20(800), 28(700)

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
EV-DO speed

-

3.1 Mbps download, 1.8 Mbps upload
LTE-A speed

LTE-A, (4CA) Cat16, 1024 Mbps download, 150 Mbps upload

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Corning Gorilla Glass 5 back panel

Aluminium alloy, polycarbonate
SIM

Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)

Dual SIM (Nano-SIM, dual stand-by)
Height

148.9 mm

162 mm
Width

68.1 mm

77 mm
Thickness

8 mm

7.98 mm
Weight

155 g

199 g
Payment

Samsung Pay(Visa, Mastercard)

-
Waterproof

IP68 - 1.5 m and 30 minutes

-
Dust proof

IP68

-
Colors

Arctic Silver, Coral Blue, Maple Gold, Midnight Black, Orchid Gray

Black, Red

Hardware
CPU

Octa-core

Octa-core
CPU

Quad-core 2.3 GHz

Dual-core 2.2 GHz Kryo 360
CPU(second)

quad-core 1.7 GHz

Hexa-core 1.7 GHz Kryo 360
Chipset

Qualcomm MSM8998 Snapdragon 835 - US / Exynos 8895 Octa - EMEA

Qualcomm Snapdragon 710
GPU

Adreno 540 - US

Qualcomm Adreno 616
Memory RAM

4 GB

6 GB
Internal storage

64 GB

128 GB
Memory card

microSD

-
Memory card max

256 GB

-

Main camera
Camera type

-

Dual
Main camera

12 MP, f/1.7 , 26 mm

12 MP, f/1.8 , 1/2.55" , 1.4 µm
5 MP, f/2.4
Primary camera resolution

-

4032 x 3024 pixels
Primary camera video

2160p@30fps, 1080p@60fps

2160p@30fps
Primary camera flash

LED flash

dual-LED flash
Primary camera optical image stabilization

optical image stabilization

-
Primary camera phase detection autofocus

phase detection autofocus

phase detection autofocus
Primary camera video dual video

dual-video record

-
Primary camera video hdr

HDR

-
Camera features

1.4 µm pixel size, 1/2.5" sensor size, Auto HDR, face/smile detection, geo-tagging, panorama, simultaneous 4K video and 9MP image recording, touch focus

Autofocus, continuous shooting, digital zoom, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

Type-C reversible connector
USB On-The-Go

-

Yes
Bluetooth

v5.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

-
Bluetooth AptX

Yes

-
NFC

Yes

-
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

-
Beidou

-

Yes
BDS

Yes

-

Features
Messaging SMS

SMS(threaded view)

-
Messaging MMS

MMS

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Mail

Push Mail

-
Java

No

-
Sensors

Iris scanner, SpO2, accelerometer, barometer, compass, fingerprint (rear-mounted), gyro, heart rate, proximity

Accelerometer, compass, fingerprint, gyroscope, light, proximity