Xiaomi Redmi K40 Provsvivo S9
We compare these two popular phones to help you decide which one fits your needs and budget better.
Xiaomi Redmi K40 Pro
#322
+10
Processor:Qualcomm Snapdragon 888
RAM:6 GBGB
Storage:128 GBGB
Quick Stats
The Redmi K40 Pro offers a 4520mAh battery with 33W fast charging, ensuring all-day use and rapid recharges.
The Redmi K40 Pro’s 120Hz OLED display delivers sharp, vibrant visuals with 386 PPI, 1300 nits brightness, and a curved design for immersive viewing.
The Redmi K40 Pro offers vibrant daylight photos with a 64MP main sensor but struggles in low light due to lack of OIS and subpar night mode.
The Redmi K40 Pro’s Snapdragon 888 and 6GB RAM deliver smooth performance, but thermal throttling may impact sustained heavy workloads.
vivo S9
#318
Winner
+12
Processor:MediaTek Dimensity 1100 (MT6891Z/CZA)
RAM:8 GBGB
Storage:128 GBGB
Quick Stats
The vivo S9 offers a 4000mAh battery with 33W fast charging, providing all-day use with quick top-ups.
The vivo S9’s 90Hz AMOLED display offers vibrant, sharp visuals with HDR10+ and 98% NTSC color accuracy for immersive media and gaming.
The vivo S9’s triple-camera system with 44MP front lens delivers 4K video, 240fps slow-mo, and AI-enhanced photo quality.
The vivo S9’s Dimensity 1100 chipset ensures smooth performance and efficient power management.
Specifications Comparison
Specification
Xiaomi Xiaomi Redmi K40 Pro
vivo vivo S9
Model
Qualcomm Snapdragon 888
MediaTek Dimensity 1100 (MT6891Z/CZA)
CPU
1x Cortex X1 2.84GHz + 3x Cortex A78 2.42GHz + 4x Cortex A55 1.8GHz
4x Cortex, A78 a 2.6 GHz +4x Cortex, A55 a 2.0 GHz
Type
Octa-Core
Octa-Core
Nanometer
5 nm
6 nm
Frequency
2,8 GHz
2,6 GHz
64 Bits
Yes
Yes
GPU
Adreno 660
ARM Mali-G77
RAM
6 GB
8 GB
Type
RAM LPDDR5
LPDDR4X RAM
Capacity
128 GB
128 GB
Type
UFS Storage 3.1
UFS Storage 2.1
SD slot
No
No
Fingerprint security
Yes, on the side
Yes, in screen
Fingerprint sensor
Yes
Yes
Proximity sensor
N/A
Yes
Light sensor
Yes
Yes
Accelerometer sensor
Yes
Yes
Compass sensor
Yes
Yes
Gyroscope sensor
Yes
Yes
Barometer sensor
Yes
N/A
Gravity sensor
N/A
Yes
RGB sensor
Yes
N/A
Ultrasonic proximity virtual sensor
Yes
N/A
Audio
Dolby Atmos, Hi-Res Audio, Stereo Speakers, 2 microphones
Hi-Res Audio, 2 microphones
Antutu Score
903172
733600
Antutu Version
Antutu v10
Antutu v10
Antutu Standing
Overall performance better than 85% of devices
Overall performance better than 79% of devices
Cooling system
Yes
No
Gaming buttons
No
No
Extras
X-axis Linear Motor
N/A
Note: Highlighted specifications show differences between the two devices.
Rankings
Connectivity
Xiaomi Redmi K40 Pro
#298
Winner
vivo S9
#471
Design
Xiaomi Redmi K40 Pro
#606
vivo S9
#116
Winner
Display
Xiaomi Redmi K40 Pro
#499
vivo S9
#486
Winner
Performance
Xiaomi Redmi K40 Pro
#332
Winner
vivo S9
#431
Battery
Xiaomi Redmi K40 Pro
#483
Winner
vivo S9
#648
Camera
Xiaomi Redmi K40 Pro
#234
Winner
vivo S9
#302
| Metric | Xiaomi Redmi K40 Pro | vivo S9 |
|---|---|---|
| Connectivity | #298 Winner | #471 |
| Design | #606 | #116 Winner |
| Display | #499 | #486 Winner |
| Performance | #332 Winner | #431 |
| Battery | #483 Winner | #648 |
| Camera | #234 Winner | #302 |
Note: Lower rank number indicates a better position in category.
Key Differences
No significant specification differences found between these devices.
Scores by Category
Pros and Cons
Xiaomi Redmi K40 Pro
Strengths
Vibrant 6.7-inch OLED display with 120Hz refresh rate and 386 PPI for sharp, immersive visuals.
Flagship Snapdragon 888 chipset with 33W fast charging and 4520mAh battery for all-day performance.
Robust connectivity (Wi-Fi 6, 5G dual SIM, Bluetooth 5.2) and clean Android 14 software experience.
Excellent value proposition with premium features at a budget-friendly price.
Weaknesses
Plastic frame compromises durability and premium feel compared to metal or glass alternatives.
Camera struggles in low-light scenarios due to lack of optical image stabilization (OIS).
Snapdragon 888's thermal throttling impacts sustained performance during heavy gaming/workloads.
No 3.5mm headphone jack, limiting compatibility with wired audio accessories.
Secondary cameras (ultra-wide and macro) lack refinement and detail compared to flagship competitors.
vivo S9
Strengths
Sleek, durable design with premium glass and aluminum build
Vibrant 90Hz AMOLED display with HDR10+ and 98% NTSC color accuracy
Versatile triple-camera system with 4K video and 240fps slow-motion
33W fast charging and 5G connectivity for modern performance
Powerful Dimensity 1100 chipset with high Antutu score for smooth multitasking
Lightweight and portable form factor with reinforced durability
Weaknesses
Battery life may require midday charging for heavy users
No expandable storage (no SD card slot)
Front camera's AI enhancements may over-process skin tones
Android 11 lacks official Google Play Services pre-installed
No 3.5mm headphone jack or advanced sensors like LiDAR
Read Full Reviews
Xiaomi Redmi K40 Pro
Flagship power meets sleek design in the Redmi K40 Pro. A vibrant display, powerful chipset, and long-lasting battery deliver a premium experience with exceptional value. Capture stunning daylight photos and enjoy immersive sound with dual speakers.
vivo S9
Elegant design meets powerful performance in the vivo S9. Vibrant display, versatile camera system, and long-lasting battery with fast charging deliver seamless 5G connectivity and dynamic user experience.
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