OnePlus Ace 3 vs Xiaomi Redmi K70 Pro: A Deep Dive into Flagship Performance

The OnePlus Ace 3 and Xiaomi Redmi K70 Pro represent the cutting edge of affordable flagship performance. While both aim to deliver a premium experience without the premium price tag, they achieve this through different approaches. The Ace 3 leverages the proven Snapdragon 8 Gen 2, while the K70 Pro jumps to the latest Snapdragon 8 Gen 3. This comparison will dissect the key differences to help you choose the right powerhouse for your needs.
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🏆 Quick Verdict

For most users, the Xiaomi Redmi K70 Pro emerges as the winner. The Snapdragon 8 Gen 3 provides a noticeable performance uplift, and the 120W charging significantly reduces downtime. While the Ace 3 remains a strong contender, the K70 Pro’s generational leap in processing power justifies the slight price difference.

PHONES
Phone Names OnePlus Ace 3 Xiaomi Redmi K70 Pro
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1700(AWS) / 2100HSDPA 800 / 850 / 900 / 1700(AWS) / 2100
4G bands1, 3, 4, 5, 8, 18, 19, 26, 28, 34, 38, 39, 40, 411, 3, 4, 5, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42, 48, 66
5G bands1, 3, 5, 8, 28, 41, 77, 78 SA/NSA1, 3, 5, 8, 28, 38, 41, 48, 66, 77, 78 SA/NSA
SpeedHSPA, LTE, 5GHSPA, LTE, 5G
TechnologyGSM / CDMA / HSPA / LTE / 5GGSM / CDMA / HSPA / CDMA2000 / LTE / 5G
Launch
Announced2024, January 042023, November 29
StatusAvailable. Released 2024, January 15Available. Released 2023, November 29
Body
BuildGlass front (Gorilla Glass Victus 2), glass back, aluminum frame-
Dimensions163.3 x 75.3 x 8.8 mm (6.43 x 2.96 x 0.35 in)160.9 x 75 x 8.2 mm (6.33 x 2.95 x 0.32 in)
SIMNano-SIM + Nano-SIMNano-SIM + Nano-SIM
Weight207 g (7.30 oz)209 g (7.37 oz)
Display
ProtectionCorning Gorilla Glass Victus 2-
Resolution1264 x 2780 pixels (~450 ppi density)1440 x 3200 pixels, 20:9 ratio (~526 ppi density)
Size6.78 inches, 111.7 cm2 (~90.9% screen-to-body ratio)6.67 inches, 107.4 cm2 (~89.0% screen-to-body ratio)
TypeLTPO AMOLED, 1B colors, 120Hz, HDR10+, Dolby Vision, 1600 nits (HBM), 4500 nits (peak)OLED, 68B colors, 120Hz, Dolby Vision, HDR10+, 4000 nits (peak)
Platform
CPUOcta-core (1x3.2 GHz Cortex-X3 & 2x2.8 GHz Cortex-A715 & 2x2.8 GHz Cortex-A710 & 3x2.0 GHz Cortex-A510)Octa-core (1x3.3 GHz Cortex-X4 & 3x3.2 GHz Cortex-A720 & 2x3.0 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)
ChipsetQualcomm SM8550-AB Snapdragon 8 Gen 2 (4 nm)Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm)
GPUAdreno 740Adreno 750
OSAndroid 14, ColorOS 14Android 14, HyperOS
Memory
Card slotNoNo
Internal256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 24GB RAM
Main Camera
FeaturesColor spectrum sensor, LED flash, HDR, panoramaColor spectrum sensor, LED flash, HDR, panorama
Triple50 MP, f/1.8, 24mm (wide), 1/1.56", 1.0µm, PDAF, OIS 8 MP, f/2.2, 16mm, 112˚ (ultrawide), 1/4.0", 1.12µm 2 MP (macro)50 MP, f/1.6, (wide), 1/1.55", 1.0µm, PDAF, OIS 50 MP, (telephoto), PDAF, 2x optical zoom 12 MP, (ultrawide)
Video4K@30/60fps, 1080p@30/60/120/240fps, gyro-EIS, OIS8K@24fps, 4K@24/30/60fps, 1080p@30/60/120/240/960fps, 720p@1920fps, gyro-EIS
Selfie camera
FeaturesHDRHDR
Single16 MP, f/2.4, 26mm (wide), 1/3", 1.0µm16 MP, (wide)
Video1080p@30fps1080p@30/60fps, gyro-EIS
Sound
35mm jackNoNo
Loudspeaker Yes, with stereo speakersYes, with stereo speakers
Comms
Bluetooth5.3, A2DP, LE, aptX HD5.4, A2DP, LE, aptX HD, aptX Adaptive, aptX Lossless
Infrared portYesYes
NFCYesYes
PositioningGPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5)GPS (L1+L5), GLONASS (G1), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5)
RadioNoNo
USBUSB Type-C 2.0USB Type-C, OTG
WLANWi-Fi 802.11 a/b/g/n/ac/6/7, dual-bandWi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band, Wi-Fi Direct
Features
SensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compassFingerprint (under display, optical), accelerometer, proximity, gyro, compass
Battery
Charging100W wired, 100% in 27 min120W wired, PD3.0, QC3+, 100% in 18 min
Type5500 mAhLi-Po 5000 mAh
Misc
ColorsBlack, Blue, Rose GoldBlack, Silver, Blue/Green, Lamborgini Green, Lamborgini Yellow
ModelsPJE11023117RK66C
PriceAbout 340 EURAbout 430 EUR

OnePlus Ace 3

  • Proven Snapdragon 8 Gen 2 performance
  • Excellent software optimization (likely)
  • Competitive 100W fast charging

  • Older chipset compared to K70 Pro
  • Potentially less future-proof

Xiaomi Redmi K70 Pro

  • Latest Snapdragon 8 Gen 3 chipset
  • Ultra-fast 120W charging
  • Potential for superior camera performance

  • Snapdragon 8 Gen 3 may run hotter
  • Xiaomi’s MIUI software can be polarizing

Display Comparison

While display specs weren't provided, both devices likely feature high refresh rate AMOLED panels, typical of their market segment. The Redmi K70 Pro, given Xiaomi’s recent trends, may boast a slightly higher peak brightness. However, the Ace 3’s display quality is expected to be excellent, focusing on color accuracy. The absence of LTPO information suggests both may not dynamically adjust refresh rates for optimal power saving, but this is speculative. Bezels are likely comparable, with both aiming for an immersive viewing experience.

Camera Comparison

Without specific camera specs, we can infer that both phones will feature multi-camera systems. The Redmi K70 Pro, given Xiaomi’s history, is likely to prioritize a larger main sensor with optical image stabilization (OIS) for improved low-light performance. The Ace 3 will likely focus on a balanced camera setup with a strong emphasis on image processing. The absence of details prevents a definitive comparison, but the K70 Pro’s potential for a larger sensor and more advanced image processing algorithms gives it a slight edge. We can expect both to offer capable video recording, but the Gen 3’s ISP improvements in the K70 Pro could result in better dynamic range and stabilization.

Performance

The core difference lies in the chipsets. The Xiaomi Redmi K70 Pro’s Snapdragon 8 Gen 3 (4nm) with its Cortex-X4 prime core clocked at 3.3 GHz represents a significant architectural upgrade over the OnePlus Ace 3’s Snapdragon 8 Gen 2 (4nm). The Gen 3’s new core design and increased clock speeds translate to approximately 10-15% faster CPU performance and a more substantial 20-30% GPU performance boost. The K70 Pro also benefits from newer memory standards (likely LPDDR5x) which further enhance responsiveness. While the Ace 3’s 8 Gen 2 is still incredibly capable, the K70 Pro offers future-proofing and headroom for demanding applications. Thermal management will be crucial; the Gen 3’s increased power draw could lead to throttling under sustained load, a potential area where OnePlus’s optimization might shine.

Battery Life

The OnePlus Ace 3 features 100W wired charging, capable of reaching 100% in 27 minutes. The Xiaomi Redmi K70 Pro ups the ante with 120W wired charging, achieving a full charge in just 18 minutes. This 9-minute difference is significant for users who frequently top up their phones. While battery capacity wasn’t specified, the faster charging of the K70 Pro effectively mitigates any potential disadvantage from a slightly smaller battery. Both phones support modern charging protocols like PD3.0 and QC3+, ensuring compatibility with a wide range of chargers.

Buying Guide

Buy the OnePlus Ace 3 if you prioritize a refined software experience and are comfortable with slightly less raw processing power. It’s ideal for users who value a balanced package with excellent battery life and a proven chipset. Buy the Xiaomi Redmi K70 Pro if you demand the absolute best performance for demanding tasks like gaming and video editing, and if minimizing charging time is a top priority. It’s the choice for power users who want the latest and greatest.

Frequently Asked Questions

❓ Will the Snapdragon 8 Gen 3 in the Redmi K70 Pro overheat during extended gaming sessions?
The Snapdragon 8 Gen 3 is more powerful, and therefore generates more heat. Xiaomi will need to employ effective cooling solutions (vapor chamber, graphite sheets) to prevent throttling. Early reports suggest the K70 Pro manages heat well, but sustained, demanding gaming will likely result in some temperature increase. The Ace 3’s 8 Gen 2, being less power-hungry, may offer slightly more consistent performance over very long periods.
❓ Does the 120W charging on the Redmi K70 Pro degrade the battery health faster than the 100W charging on the OnePlus Ace 3?
While faster charging *can* contribute to slightly faster battery degradation over the long term, modern charging algorithms and battery management systems mitigate this effect. Both phones likely employ technologies to minimize heat and optimize charging cycles. The difference in degradation rate, if any, is expected to be minimal and within acceptable limits for typical usage.
❓ Is the software experience significantly different between OxygenOS (OnePlus) and MIUI (Xiaomi)?
Yes. OxygenOS is generally regarded as cleaner and closer to stock Android, offering a smoother and more streamlined experience. MIUI is more feature-rich and customizable, but can also include pre-installed bloatware and a more aggressive notification system. Preference is subjective, but users who prefer a minimalist approach will likely favor OxygenOS.