Xiaomi Redmi K80 Ultra vs. vivo X100 Pro: A Head-to-Head Flagship Showdown

The Xiaomi Redmi K80 Ultra and the vivo X100 Pro represent distinct approaches to the flagship smartphone experience. The K80 Ultra aims for peak performance with the latest Mediatek Dimensity 9400+ chipset, while the X100 Pro focuses on a well-rounded package with a strong emphasis on camera capabilities and battery endurance. This comparison dissects their key differences to help you choose the right device.
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🏆 Quick Verdict

For the average user prioritizing all-day battery life and a consistently excellent camera, the vivo X100 Pro emerges as the winner. However, power users and mobile gamers seeking the absolute fastest CPU performance will find the Xiaomi Redmi K80 Ultra more appealing.

PHONES
Phone Names Xiaomi Redmi K80 Ultra vivo X100 Pro
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 800 / 850 / 900 / 1700(AWS) / 2100HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands1, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41, 42, 48, 661, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 32, 38, 39, 40, 41, 42, 66 - International
5G bands1, 3, 5, 7, 8, 26, 28, 38, 40, 41, 48, 66, 77, 78 SA/NSA1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 75, 77, 78, 79 SA/NSA - International
SpeedHSPA, LTE, 5GHSPA, LTE, 5G
TechnologyGSM / CDMA / HSPA / CDMA2000 / LTE / 5GGSM / CDMA / HSPA / LTE / 5G
Launch
Announced2025, June 262023, November 13
StatusAvailable. Released 2025, June 26Available. Released 2023, November 21
Body
BuildGlass front, aluminum frameGlass front, aluminum frame, glass back
Dimensions163.1 x 77.9 x 8.2 mm (6.42 x 3.07 x 0.32 in)164.1 x 75.3 x 8.9 mm or 9.1 mm
SIMNano-SIM + Nano-SIM· Nano-SIM + eSIM· Nano-SIM + Nano-SIM
Weight219 g (7.72 oz)221 g or 225 g (7.80 oz)
Display
ProtectionScratch/drop-resistant glass-
Resolution1280 x 2772 pixels, 19.5:9 ratio (~447 ppi density)1260 x 2800 pixels, 20:9 ratio (~452 ppi density)
Size6.83 inches, 114.5 cm2 (~90.2% screen-to-body ratio)6.78 inches, 111.5 cm2 (~90.2% screen-to-body ratio)
TypeOLED, 68B colors, 144Hz, Dolby Vision, HDR10+, HDR Vivid, 1800 nits (HBM), 3200 nits (peak)LTPO AMOLED, 1B colors, 120Hz, HDR10+, 3000 nits (peak)
Platform
CPUOcta-core (1x3.63 GHz Cortex-X925 & 3x3.3 GHz Cortex-X4 & 4x2.4 GHz Cortex-A720)Octa-core (1x3.25 GHz Cortex-X4 & 3x2.85 GHz Cortex-X4 & 4x2.0 GHz Cortex-A720)
ChipsetMediatek Dimensity 9400+ (3 nm)Mediatek Dimensity 9300 (4 nm)
GPUImmortalis-G925Immortalis-G720 MC12
OSAndroid 15, HyperOS 2Android 14, upgradable to Android 15, Funtouch 15 (International), OriginOS 4 (China)
Memory
Card slotNoNo
Internal256GB 12GB RAM, 256GB 16GB RAM, 512GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM256GB 12GB RAM, 256GB 16GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
Main Camera
Dual50 MP, f/1.9, 23mm (wide), 1/1.55", 1.0µm, PDAF, OIS 8 MP, 119˚ (ultrawide), 1/4.0", 1.12µm-
FeaturesColor spectrum sensor, Dual-LED dual-tone flash, HDR, panoramaLaser AF, color spectrum sensor, Zeiss optics, Zeiss T* lens coating, LED flash, panorama, HDR, 3D LUT import
Triple-50 MP, f/1.8, 23mm (wide), 1/0.98", 1.6µm, dual pixel PDAF, OIS 50 MP, f/2.5, 100mm (periscope telephoto), 1/2.51", 0.7µm, PDAF (18cm - ∞), OIS, 4.3x optical zoom 50 MP, f/2.0, 15mm, 119˚ (ultrawide), 1/2.76", 0.64µm, AF
Video8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS8K@30fps, 4K@30/60fps, 1080p, gyro-EIS
Selfie camera
FeaturesHDRHDR
Single20 MP, (wide), 1/2.0", 0.8µm32 MP, f/2.0, 20mm (ultrawide)
Video1080p@30/60fps4K@30/60fps, 1080p@30/60fps
Sound
35mm jackNoNo
Loudspeaker Yes, with stereo speakersYes, with stereo speakers
Comms
Bluetooth5.4, A2DP, LE, LHDC 55.4, A2DP, LE, aptX HD, LHDC
Infrared portYesYes
NFCYesYes
PositioningGPS (L1+L5), BDS (B1I+B1C+B2a+B2b), GALILEO (E1+E5a+E5b), QZSS (L1+L5), NavIC, GLONASSGPS (L1+L5), GLONASS (L1), BDS (B1I+B1c+B2a+B2b), GALILEO (E1+E5a+E5b), QZSS (L1+L5), NavIC (L5)
RadioUnspecifiedNo
USBUSB Type-CUSB Type-C 3.2, OTG
WLANWi-Fi 802.11 a/b/g/n/ac/6/7, dual-band, Wi-Fi DirectWi-Fi 802.11 a/b/g/n/ac/6/7, tri-band, Wi-Fi Direct
Features
SensorsFingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compassFingerprint (under display, optical), accelerometer, gyro, proximity, compass
Battery
Charging100W wired, PD3.0 Bypass charging100W wired, 50% in 14 min 50W wireless Reverse wired
TypeSi/C Li-Ion 7410 mAhLi-Ion 5400 mAh
Misc
ColorsGray, White, Blue, GreenStartrail Blue, Asteroid Black, Sunset Orange, White
Models-V2324A, V2309
PriceAbout 310 EUR₹ 59,999
SAR EU-0.99 W/kg (head)     1.19 W/kg (body)

Xiaomi Redmi K80 Ultra

  • Potentially faster CPU performance with Dimensity 9400+
  • PD3.0 wired charging compatibility
  • Likely more affordable price point

  • Potentially shorter battery life
  • Camera system may not be as advanced as the X100 Pro

vivo X100 Pro

  • Exceptional battery life (13:53h active use)
  • Brighter display (1472 nits)
  • 50W wireless and reverse wired charging

  • Dimensity 9300 may be slightly slower than the 9400+
  • Potentially higher price

Display Comparison

The vivo X100 Pro boasts a significantly brighter display, reaching a measured peak of 1472 nits, ensuring excellent visibility even in direct sunlight. While the K80 Ultra’s display specs are currently unknown, vivo’s panel offers a superior viewing experience in bright conditions. The X100 Pro likely utilizes LTPO technology for adaptive refresh rates, contributing to battery efficiency, a feature we anticipate the K80 Ultra may lack. Bezels and color accuracy will require hands-on testing, but the X100 Pro’s brightness advantage is a clear win.

Camera Comparison

The vivo X100 Pro is positioned as a camera-centric device, and while specific sensor details are missing for both phones, vivo’s history suggests a focus on image quality and computational photography. The X100 Pro’s camera system is designed for both photo and video, likely featuring advanced OIS and large apertures for low-light performance. The K80 Ultra, while capable, is likely to prioritize overall performance over camera specialization. We can expect the X100 Pro to excel in dynamic range and detail, while the K80 Ultra may offer a more neutral image processing style.

Performance

The Xiaomi Redmi K80 Ultra’s Mediatek Dimensity 9400+ (3nm) chipset, with its Cortex-X925 prime core clocked at 3.63 GHz, is designed for peak performance, theoretically surpassing the vivo X100 Pro’s Dimensity 9300 (4nm). The 9400+’s architecture, featuring more Cortex-X4 cores (3 vs 3 in the 9300), suggests a stronger focus on multi-core performance. However, the 4nm process of the 9300 may offer better thermal efficiency, potentially mitigating throttling under sustained load. The K80 Ultra’s LPDDR5x RAM configuration is standard, but the 9300’s optimized architecture could deliver comparable real-world performance despite the clock speed difference.

Battery Life

The vivo X100 Pro’s 13:53h active use score demonstrates impressive battery endurance, a significant advantage over what we might expect from a performance-focused device like the K80 Ultra. Both phones support 100W wired charging, with the X100 Pro reaching 50% charge in 14 minutes. However, the X100 Pro adds the convenience of 50W wireless charging and reverse wired charging, offering greater flexibility. The K80 Ultra’s PD3.0 support is a welcome addition for compatibility with a wider range of chargers, but the X100 Pro’s overall battery package is more compelling.

Buying Guide

Buy the Xiaomi Redmi K80 Ultra if you need uncompromising CPU performance for demanding tasks like video editing, emulation, or competitive mobile gaming. Its Dimensity 9400+ offers a clear advantage in raw processing power. Buy the vivo X100 Pro if you prefer a more balanced experience with exceptional camera quality, long-lasting battery life (13:53h active use), and the convenience of 50W wireless charging.

Frequently Asked Questions

❓ Will the Dimensity 9400+ in the K80 Ultra overheat during extended gaming sessions?
While the Dimensity 9400+ is a powerful chipset, the potential for thermal throttling depends heavily on Xiaomi’s cooling solution. The 4nm process of the Dimensity 9300 in the X100 Pro may offer better thermal efficiency, but a well-designed cooling system in the K80 Ultra could mitigate this.
❓ How does the 100W charging on both phones compare in real-world speed?
Both phones support 100W wired charging, but the X100 Pro reaches 50% charge in 14 minutes. The K80 Ultra’s charging speed will likely be similar, but the X100 Pro’s addition of 50W wireless charging provides a significant convenience advantage.
❓ Is the difference between the Cortex-X925 and Cortex-X4 cores in the Dimensity 9400+ and 9300 noticeable in everyday use?
The architectural differences between the cores are most noticeable in sustained, demanding tasks like video editing or heavy gaming. For typical everyday use, the difference will be minimal, as both chipsets offer ample performance.
❓ Does the vivo X100 Pro support high refresh rate gaming, and what frame rates can be expected?
While specific gaming performance data is unavailable, the X100 Pro’s powerful chipset and likely optimized software should support high refresh rate gaming in popular titles. Expect stable frame rates at 60fps or higher in most games, with potential for 90fps or 120fps depending on the game’s settings.