Home Compare Realme C75x vs Xiaomi 15 Ultra

Compare Phones.

Compare features, prices and ratings to find the perfect phone for you.

Clear All
+
Add More Phones
Realme C75x
Realme Realme C75x
2.6
Price TBA
View Details
Xiaomi 15 Ultra
Xiaomi Xiaomi 15 Ultra
512GB · 16GB RAM
4.3
From $1,099
View Details
★ Our Pick

Our Verdict

Analysis

Xiaomi 15 Ultra has the bigger display.

Overall Winner
Xiaomi 15 Ultra
Display Winner
Xiaomi 15 Ultra
Performance Winner
Tie
Camera Winner
Tie
Battery Winner
Tie
Value Winner
Tie

Specifications Comparison

Feature Realme C75x Xiaomi 15 Ultra
Display size (in) 6.67 6.73
Charging (W) 45 90
Selfie (MP) 5.00 32.00
Weight (g) 196 226
Thickness (mm) 8.00 9.35
Chipset Mediatek Helio G81 Ultra (12 nm) Snapdragon 8 Elite
OS Android 15, Realme UI 6.0 Android 15, HyperOS 2

Pros & Cons

Realme C75x

Xiaomi 15 Ultra

  • Outstanding camera versatility
  • Fast wired and wireless charging
  • Bright display
  • Heavy
  • Software still polishing animations
  • Limited availability in some regions

Every Spec, Side by Side

Specification
Realme
Realme C75x
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
5600 mAh
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Charging
45W wired, 100% in 90 min
90W wired, 80W wireless
Capacity
5410 mAh
Body 5 specs
Dimensions
165.7 x 76.2 x 8 mm (6.52 x 3.00 x 0.31 in)
161.3 x 75.3 x 9.35 mm
Weight
196 g (6.91 oz)
226 g
SIM
Nano-SIM + Nano-SIM
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
 
IP68/IP69 dust tight and water resistant (high pressure water jets; immersible up to 2m for 60 hours) Drop resistant up to 1.8m MIL-STD-810H compliant* * does not guarantee ruggedness or use in extreme conditions
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Aerospace-grade glass fiber
Build
Glass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frame
Connectivity 8 specs
WLAN
Wi-Fi 802.11 a/b/g/n/ac, dual-band
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
5.0, A2DP, LE
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS, GALILEO, GLONASS, QZSS, BDS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
NFC
No
Yes
Radio
Unspecified
No
USB
USB Type-C 2.0
USB Type-C 3.2 Gen 2, DisplayPort, OTG
Infrared port
Yes
5G
Yes
Display 4 specs
Type
IPS LCD, 120Hz, 500 nits (typ), 625 nits (HBM)
LTPO AMOLED
Size
6.67 inches, 107.2 cm2 (~84.9% screen-to-body ratio)
6.73 inches
Resolution
720 x 1604 pixels, 20:9 ratio (~264 ppi density)
1440 x 3200 pixels
Protection
ArmorShell glass
Xiaomi Shield Glass 2.0, Mohs level 6
Features 2 specs
Sensors
Fingerprint (side-mounted), accelerometer, proximity, compass
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
 
Two-way satellite communication (China model only)
Launch 2 specs
Announced
2025, March 07
2025, February 27
Status
Available. Released 2025, March 08
Available. Released 2025, February 27
Main Camera 4 specs
Single
50 MP, f/1.8, (wide), 1/2.88", PDAF
Features
LED flash, panorama
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Video
1080p@30fps
8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240/480/960/1920fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K@60fps, 1080p)
Quad
50 MP + 50 MP + 200 MP + 50 MP
Memory 5 specs
Card slot
microSDXC (dedicated slot)
No
Internal
128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
 
UFS 4.1
RAM
16GB
Storage
512GB
Misc 4 specs
Colors
Coral Pink, Oceanic Blue
Black, White, Silver Chrome, Green
Price
$ 329.91
$ 693.75 / £ 1,295.00 / € 812.34
Models
25010PN30G
SAR EU
1.00 W/kg (head)     1.00 W/kg (body)    
Network 7 specs
Technology
GSM / HSPA / LTE
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 850 / 900 / 2100
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
1, 3, 5, 7, 8, 20, 28, 38, 40, 41
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66, 71 - International
Speed
HSPA, LTE
HSPA, LTE, 5G
 
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79, 80, 81, 83, 84, 89 SA/NSA - China
5G bands
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International
Platform 4 specs
OS
Android 15, Realme UI 6.0
Android 15, HyperOS 2
Chipset
Mediatek Helio G81 Ultra (12 nm)
Snapdragon 8 Elite
CPU
Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Mali-G52 MC2
Adreno 830
Selfie Camera 3 specs
Single
5 MP, f/2.2, (wide), 1/5"
32 MP
Features
Panorama
HDR, panorama
Video
1080p@30fps
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Sound 3 specs
Loudspeaker
Yes
Yes, with stereo speakers
3.5mm jack
No
No
 
24-bit/192kHz Hi-Res & Hi-Res Wireless audio Qualcomm XPAN (24-bit/96kHz audio)
Eu Label 4 specs
Energy
Class A
Battery
58:58h endurance, 1000 cycles
Free fall
Class C (90 falls)
Repairability
Class C
Our Tests 2 specs
Loudspeaker
-24.1 LUFS (Very good)
Battery
Active use score 16:13h

Similar Comparisons

Stay Updated with the Best Deals!

Subscribe to our newsletter and never miss new launches, deals & offers.

Common Questions

Which phone is the best in this comparison?

Xiaomi 15 Ultra has the bigger display.

How are the comparison winners decided?

We compare measurable specs (display size, battery capacity, RAM, charging, weight) and price (USD). When two phones tie or data is missing we mark the category "Depends".

Which is more affordable?

The cheaper option is shown as the value winner above. Prices are USD and may vary by region or retailer.