Oppo K9s vs vivo S15

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

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 19, 28, 34, 38, 39, 40, 41
5G network

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

5G band 1, 3, 5, 8, 28, 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

IPS LCD

AMOLED
Physical size

6.59 inches

6.62 inches
Resolution

1080 x 2412 pixels

1080 x 2400 pixels
Pixel density

401 ppi

398 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen, Panda glass

Scratch resistant, 2.5D curved glass screen
Display features

120Hz, 480 nits (typ), 600 nits (HBM)

120Hz, HDR10+, 1300 nits (peak)

Hardware
CPU

Octa-core

Octa-core
CPU

Quad-core 2.4 GHz Kryo 670

Single-core 3.2 GHz Kryo 585
CPU(second)

quad-core 1.9 GHz Kryo 670

Triple-core 2.42 GHz Kryo 585
CPU(third)

Quad-core 1.80 GHz Kryo 585
Chipset

Qualcomm SM7325 Snapdragon 778G 5G

Qualcomm SM8250-AC Snapdragon 870 5G
GPU

Adreno 642L

Adreno 650
Memory RAM

6, 8 GB

8, 12 GB
Internal storage

128 GB

128, 256 GB
Memory card

microSD, microSDHC, microSDXC

No
Memory card max

512 GB

-
Storage

UFS 2.2

UFS 3.1

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 64 MP, f/1.7 , 81˚ , 26 mm, 1/2.0" , 0.8 µm, 20x digital zoom

(wide) , 64 MP, f/1.9 , 25 mm, 1/1.72"
(ultrawide) , 8 MP, f/2.2 , 120˚ , 1/4" , 1.12 µm

(ultrawide) , 8 MP, f/2.2 , 120˚ , 16 mm
89˚ , (macro) , 2 MP, f/2.4 , 1/5" , 1.75 µm

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

9248 x 6936 pixels

9280 x 6920 pixels
Primary camera video

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

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

LED flash

LED flash
Camera features

Autofocus, continuous autofocus, continuous shooting, digital zoom, digital 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) , 16 MP, f/2.0 , 79˚

(wide) , 32 MP, f/2.0
Selfie camera resolution

4608 x 3456 pixels

-
Selfie camera features

Face unlock, HDR

Face unlock, autofocus, HDR, face detection, panorama, geotagging, digital image stabilization
Selfie camera video

1080p@30fps, gyro-EIS

1080p@30fps

Connectivity
WLAN

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

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

v5.2

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