OnePlus Ace vs Oppo K9

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

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41

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

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

5G band 1, 3, 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

LTE-A, 1200 Mbps download, 210 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

OLED

Super AMOLED
Physical size

6.7 inches

6.43 inches
Resolution

1080 x 2412 pixels

1080 x 2400 pixels
Pixel density

394 ppi

409 ppi
Display colors

1073741824

16777216
Protection

Scratch resistant, Corning Gorilla Glass 5

Scratch resistant, 2.5D curved glass screen
Display features

1B colors, 120Hz, HDR10+, 500 nits (typ), 800 nits (HBM), 950 nits (peak)

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

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 50 MP, f/1.9 , 24 mm, 1/1.56" , 1.0 µm

(wide) , 64 MP, f/1.7 , 1/2.0" , 0.8 µm, 80˚ , 20x digital zoom
(ultrawide) , 8 MP, f/2.2 , 16 mm, 1/4.0" , 1.12 µm

(ultrawide) , 8 MP, f/2.2 , 119˚
88˚ , (macro) , 2 MP, f/2.4 , 21 mm, 1/5" , 1.75 µm

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

8192 x 6144 pixels

9280 x 6920 pixels
Primary camera video

4K@30/60fps, 1080p@30/60/240fps, gyro-EIS

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

LED flash

LED flash
Camera features

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, UIS, UIS Max

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

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 16 MP, f/2.4 , 16 mm, 1/3.09" , 1.0 µm

(wide) , 32 MP, f/2.4 , 0.8 µm, 80˚
Selfie camera resolution

4608 x 3456 pixels

6560 x 4928 pixels
Selfie camera features

HDR, panorama

Face unlock, 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
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
Bluetooth

v5.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD
NFC

Yes

No
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

-

Yes

Features
Sensors

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

Accelerometer, compass, fingerprint, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

4500 mAh

4300 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

SuperVOOC, 150W (50% in 5 min)

VOOC 4.0 (100% in 35 min)
Wireless charging

Yes

-
Wireless reverse charging

Yes

-