Oppo K9 vs vivo S17

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

GSM 850, 900, 1800, 1900; CDMA 800
3G network

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x
4G network

LTE frequency band 1, 3, 4, 5, 8, 28, 34, 38, 39, 40, 41

LTE frequency band 1, 3, 4, 5, 8, 19, 28, 34, 38, 39, 40, 41
5G network

5G band 1, 3, 28, 41, 77, 78 SA/NSA

5G band 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A, 1200 Mbps download, 210 Mbps upload

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

Super AMOLED

AMOLED
Physical size

6.43 inches

6.78 inches
Resolution

1080 x 2400 pixels

1260 x 2800 pixels
Pixel density

409 ppi

453 ppi
Display colors

16777216

1073741824
Protection

Scratch resistant, 2.5D curved glass screen

Scratch resistant, 3D curved glass screen
Display features

90Hz, 430 nits (typ), 750 nits (peak)

120Hz, HDR10+, 1300 nits (peak)

Hardware
CPU

Octa-core

Octa-core
CPU

Single-core 2.8 GHz Kryo 475 Prime

Single-core 2.5 GHz Cortex-A78
CPU(second)

Single-core 2.4 GHz Kryo 475 Gold

Triple-core 2.4 GHz Cortex-A78
CPU(third)

Hexa-core 1.8 GHz Kryo 475 Silver

Quad-core 1.9 GHz Cortex-A55
Chipset

Qualcomm SM7250-AC Snapdragon 768G 5G

Qualcomm SM7325-AE Snapdragon 778G+ 5G
GPU

Adreno 620

Adreno 642L
Memory RAM

8 GB

8, 12 GB
Internal storage

128, 256 GB

256, 512 GB
Memory card

No

No
Storage

-

UFS 2.2/3.1

Main camera
Camera type

Triple

Dual
Main camera

(wide) , 64 MP, f/1.7 , 80˚ , 1/2.0" , 0.8 µm, 20x digital zoom

(wide) , 50 MP, f/1.9 , 1/1.56" , 1.0 µm
(ultrawide) , 8 MP, f/2.2 , 119˚

(ultrawide) , 8 MP, f/2.2
(macro) , 2 MP, f/2.4
Primary camera resolution

9280 x 6920 pixels

8120 x 6180 pixels
Primary camera video

4K@30fps, 1080p@30/60/120fps; gyro-EIS

4K@30fps, 1080p@30fps
Primary camera flash

LED flash

Ring-LED flash
Camera features

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

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

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 32 MP, f/2.4 , 80˚ , 0.8 µm

(wide) , 50 MP, f/2.0 , 22 mm
Selfie camera resolution

6560 x 4928 pixels

8160 x 6112 pixels
Selfie camera features

Face unlock, digital image stabilization

-
Selfie camera video

1080p@30fps

1080p@30fps

Connectivity
WLAN

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

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.0

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

aptX HD, aptX Adaptive
NFC

No

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

Yes

Features
Sensors

Accelerometer, compass, fingerprint, gyroscope, proximity

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4300 mAh

4600 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

VOOC 4.0 (100% in 35 min)

SuperVOOC, 80W (70% in 30 min)