The smartphone market is overflowing with options, making it tough to pick the perfect device. Today, we're pitting two contenders against each other: the Oppo K9s, known for its performance, and the Xiaomi Redmi 9T, a champion of battery life and affordability. Let's dive into a detailed comparison to see which phone comes out on top.
🏆 Quick Verdict
The Oppo K9s clearly wins on performance thanks to its Snapdragon 778G chipset. However, the Redmi 9T offers exceptional battery life and a lower price point. If speed is your priority, choose the K9s; if longevity and value are key, the Redmi 9T is a strong contender.
| Network |
|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 |
| 4G bands | 1, 3, 4, 5, 8, 19, 28, 34, 38, 39, 40, 41 | 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 |
| 5G bands | 1, 28, 41, 77, 78 SA/NSA | - |
| Speed | HSPA, LTE, 5G | HSPA, LTE |
| Technology | GSM / CDMA / HSPA / CDMA2000 / LTE / 5G | GSM / HSPA / LTE |
| | CDMA2000 1x | - |
| Launch |
|---|
| Announced | 2021, October 20 | 2021, January 08 |
| Status | Available. Released 2021, November 01 | Available. Released 2021, January 18 |
| Body |
|---|
| Build | - | Glass front (Gorilla Glass 3), plastic frame, plastic back |
| Dimensions | 164.4 x 75.9 x 8.5 mm (6.47 x 2.99 x 0.33 in) | 162.3 x 77.3 x 9.6 mm (6.39 x 3.04 x 0.38 in) |
| SIM | Nano-SIM + Nano-SIM | Nano-SIM + Nano-SIM |
| Weight | 199 g (7.02 oz) | 198 g (6.98 oz) |
| | - | Water-repellent coating |
| Display |
|---|
| Protection | Panda Glass | Corning Gorilla Glass 3 |
| Resolution | 1080 x 2412 pixels, 20:9 ratio (~401 ppi density) | 1080 x 2340 pixels, 19.5:9 ratio (~395 ppi density) |
| Size | 6.59 inches, 104.5 cm2 (~83.7% screen-to-body ratio) | 6.53 inches, 104.7 cm2 (~83.4% screen-to-body ratio) |
| Type | IPS LCD, 120Hz, 480 nits (typ), 600 nits (HBM) | IPS LCD, 400 nits (typ) |
| Platform |
|---|
| CPU | Octa-core (1x2.4 GHz Cortex-A78 & 3x2.2 GHz Cortex-A78 & 4x1.9 GHz Cortex-A55) | Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) |
| Chipset | Qualcomm SM7325 Snapdragon 778G 5G (6 nm) | Qualcomm SM6115 Snapdragon 662 (11 nm) |
| GPU | Adreno 642L | Adreno 610 |
| OS | Android 11, ColorOS 11.2 | Android 10, MIUI 12 |
| Memory |
|---|
| Card slot | microSDXC | microSDXC (dedicated slot) |
| Internal | 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM | 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM |
| | UFS 2.2 | UFS 2.1 - 64GB
UFS 2.2 - 128GB |
| Main Camera |
|---|
| Features | LED flash, HDR, panorama | LED flash, HDR, panorama |
| Quad | - | 48 MP, f/1.8, 26mm (wide), 1/2.0", 0.8µm, PDAF
8 MP, f/2.2, 120˚ (ultrawide), 1/4.0", 1.12µm
2 MP (macro)
Auxiliary lens |
| Single | 16 MP, f/2.0, 26mm (wide) | - |
| Triple | 64 MP, f/1.7, 26mm (wide), PDAF
8 MP, f/2.2, 120˚ (ultrawide)
2 MP (macro) | - |
| Video | 4K@30fps, 1080p@30/60/120fps; gyro-EIS | 1080p@30fps |
| Selfie camera |
|---|
| Features | Panorama | - |
| Single | 16 MP, f/2.0, 26mm (wide) | 8 MP, f/2.1, 27mm (wide), 1/4.0", 1.12µm |
| Video | 1080p@30fps, gyro-EIS | 1080p@30fps |
| Sound |
|---|
| 3.5mm jack | Yes | Yes |
| 35mm jack | Yes | Yes |
| Loudspeaker | Yes | Yes, with stereo speakers |
| | - | 24-bit/192kHz audio |
| Comms |
|---|
| Bluetooth | 5.2, A2DP, LE, aptX HD | 5.0, A2DP, LE |
| Infrared port | - | Yes |
| NFC | No | Yes (market/region dependent) |
| Positioning | GPS, GLONASS, GALILEO, BDS, QZSS | GPS, GLONASS, GALILEO, BDS |
| Radio | No | FM radio |
| USB | USB Type-C 2.0, OTG | USB Type-C 2.0, OTG |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Features |
|---|
| Sensors | Fingerprint (side-mounted), accelerometer, gyro, proximity, compass | Fingerprint (side-mounted), accelerometer, proximity, compass |
| Battery |
|---|
| Charging | 30W wired
5W reverse wired | 18W wired
2.5W reverse wired |
| Type | Li-Po 5000 mAh | Li-Po 6000 mAh |
| Misc |
|---|
| Colors | Black, Silver, Aurora | Carbon Gray, Twilight Blue, Sunrise Orange, Ocean Green |
| Models | PERM10 | J19S, M2010J19SG, M2010J19SY |
| Price | - | € 87.56 |
| SAR | - | 1.09 W/kg (head) 1.00 W/kg (body) |
| SAR EU | - | 0.60 W/kg (head) 0.81 W/kg (body) |
| Pricing |
|---|
| 128GB 6GB RAM | - | Rp 2,272,000 |
| 64GB 4GB RAM | - | $ 168.78 |
| Tests |
|---|
| Battery life | - |
Endurance rating 150h
|
| Camera | - |
Photo / Video |
| Display | - |
Contrast ratio: 1594:1 |
| Loudspeaker | - |
-25.6 LUFS (Very good)
|
| Performance | - |
AnTuTu: 177917 (v8)
GeekBench: 1400 (v5.1)
GFXBench: 5.8fps (ES 3.1 onscreen) |
Oppo K9s
- Superior Performance (Snapdragon 778G)
- Faster Charging (30W)
- Likely better display quality
- Modern Chipset (6nm)
- Potentially shorter battery life
- Higher price point
- Camera may not be as versatile as Redmi 9T's quad-camera
Xiaomi Redmi 9T
- Exceptional Battery Life (150h endurance)
- Affordable Price
- Large Display
- Good Value for Money
- Slower Performance (Snapdragon 662)
- Slower Charging (18W)
- Older Chipset (11nm)
Display Comparison
The Redmi 9T boasts a large 6.67-inch display with a high contrast ratio of 1594:1 and a measured brightness of 437 nits. While the Oppo K9s likely has a slightly more vibrant display (typical of Oppo), the Redmi 9T's size and contrast offer a compelling viewing experience, especially for media consumption. Resolution is likely FHD+ on both.
Camera Comparison
Both phones offer versatile camera setups. The Redmi 9T typically features a quad-camera system, often including a high-resolution main sensor. The Oppo K9s likely has a triple-camera setup, potentially focusing on image processing and low-light performance. Image quality will depend on specific sensor sizes and software optimization, but the K9s' chipset may offer better image processing capabilities.
Performance
This is where the Oppo K9s shines. The Snapdragon 778G is significantly more powerful than the Redmi 9T's Snapdragon 662. Expect noticeably faster app loading, smoother multitasking, and better gaming performance on the K9s. The K9s' 6nm process also contributes to better power efficiency despite the higher performance.
Battery Life
The Redmi 9T is the clear winner here. Its endurance rating of 150 hours is exceptional. The Oppo K9s, while offering 30W fast charging, likely has a smaller battery capacity and won't match the Redmi 9T's longevity.
Buying Guide
Who should buy the Oppo K9s? Gamers, power users, and anyone prioritizing smooth performance and faster charging. Who should buy the Xiaomi Redmi 9T? Budget-conscious buyers, those who need a phone that lasts all day (and then some), and users who value a large display.
Frequently Asked Questions
❓ Is the Oppo K9s good for gaming?
Yes, the Oppo K9s' Snapdragon 778G chipset makes it a capable gaming phone, handling most games smoothly at high settings.
❓ How long will the Redmi 9T's battery last?
The Redmi 9T is known for its exceptional battery life, often lasting two days or more with moderate usage.
