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K9 Pro vs Redmi K40 Pro

OPPO K9 Pro vs Xiaomi Redmi K40 Pro

What K9 Pro does better (7) and where Redmi K40 Pro wins (8) — every spec side by side.

OPPO · 2021K9 Pro

7.8Score

7 advantages≈ $390

Higher score

Xiaomi · 2021Redmi K40 Pro

7.8Score

8 advantages≈ $390

7.4Display7.9

7.2Camera8.2

5.2Battery4.2

8.7Features7.0

Dimensions

Size comparison

K9 ProRedmi K40 Pro

	K9 Pro	Redmi K40 Pro	Difference
Height	158.7 mm	163.7 mm	−5 mm
Width	73.5 mm	76.4 mm	−2.9 mm
Thickness	8.5 mm	7.8 mm	+0.7 mm
Weight	180 g	196 g	−16 g

Drawn to the same scale from the official dimensions (front and side).

Why is K9 Pro better than Redmi K40 Pro?

Wired charging60 W vs 33 W+82%
3.5 mm headphone jackYes · Redmi K40 Pro: No
Weight180 g vs 196 g+9%
CPU frequency3 GHz vs 2.84 GHz+6%
Pixel density409 ppi vs 395 ppi+4%
Charged in 30 min94% vs 58%+62%
Main camera aperturef/1.7 vs f/1.9+12%

Why is Redmi K40 Pro better than K9 Pro?

Peak brightness800 nits vs 1,300 nits+62%
Max video4K vs 8K
4K video frame rate30 fps vs 60 fps2×
Screen size6.4″ vs 6.7″+4%
Selfie camera16 MP vs 20 MP+25%
Process6 nm vs 5 nm+20%
Thickness8.5 mm vs 7.8 mm+9%
Wi-Fi standardWi-Fi 6 vs Wi-Fi 6E+8%

Specifications

Side by side

Only differences	OPPO K9 Pro≈ $3907.8	Xiaomi Redmi K40 Pro≈ $3907.8
Design
Weight	180 g	196 g
Thickness	8.5 mm	7.8 mm
Height	158.7 mm	163.7 mm
Width	73.5 mm	76.4 mm
Ingress protection	—	IP53
Water resistance (IPx)	—	IPx3
Glass protection	—	Corning Gorilla Glass 5
Colours	Black, Aurora	Black, White, Aurora
Display
Screen size	6.4″	6.7″
Panel	AMOLED	Super AMOLED
OLED panel	Yes	Yes
Resolution (width)	1,080 px	1,080 px
Resolution (height)	2,400 px	2,400 px
Pixel density	409 ppi	395 ppi
Refresh rate	120 Hz	120 Hz
Peak brightness	800 nits	1,300 nits
Screen-to-body ratio	85.6%	85.9%
HDR	Yes	Yes
Performance
Chipset	Mediatek Dimensity 1200	Qualcomm SM8350 Snapdragon 888 5G
Chip maker	MediaTek	Qualcomm
Process	6 nm	5 nm
CPU cores	8	8
CPU frequency	3 GHz	2.84 GHz
GPU	Mali-G77 MC9	Adreno 660
Memory
RAM	12 GB	12 GB
Storage (max)	256 GB	256 GB
Storage (base)	128 GB	128 GB
Storage type	UFS 3.1	UFS 3.1
Memory card slot	No	No
Camera
Main camera	64 MP	64 MP
Main camera aperture	f/1.7	f/1.9
Main sensor size	—	1/1.7"
Rear cameras	2	2
Optical stabilisation	No	No
Ultra-wide camera	Yes	Yes
Telephoto camera	No	No
Max video	4K	8K
4K video frame rate	30 fps	60 fps
Selfie camera	16 MP	20 MP
4K selfie video	No	No
Battery
Battery capacity	4,500 mAh	4,520 mAh
Battery type	Li-Po	Li-Po
Wired charging	60 W	33 W
Charged in 30 min	94%	58%
Wireless charging	No	No
Connectivity
5G	Yes	Yes
eSIM	No	No
Dual SIM	Yes	Yes
Wi-Fi standard	Wi-Fi 6	Wi-Fi 6E
Bluetooth	5.2	5.2
NFC	Yes	Yes
USB	USB Type-C 2.0	USB Type-C 2.0
USB version	2	2
Dual-band GPS	—	Yes
Satellite navigation	GLONASS, GALILEO, BDS, QZSS	GLONASS, GALILEO, BDS, QZSS, NavIC
Features
Stereo speakers	Yes	Yes
3.5 mm headphone jack	Yes	No
Fingerprint sensor	Under display	Side
Barometer	—	Yes
Sensors	Fingerprint (under display, optical), accelerometer, gyro, proximity, compass	Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, barometer
Software
OS at launch	Android 11	Android 11
Platform	Android	Android
Interface	ColorOS 11.3	MIUI 12