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Oppo Oppo Reno4 Z 5G
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 Oppo Reno4 Z 5G Xiaomi 15 Ultra
Display size (in) 6.57 6.73
Charging (W) 18 90
Main camera (MP) 48.00 50.00
Selfie (MP) 16.00 32.00
Weight (g) 184 226
Thickness (mm) 8.10 9.35
Chipset Mediatek Dimensity 800 (7 nm) Snapdragon 8 Elite
OS Android 10, upgradable to Android 11, ColorOS 11.1 Android 15, HyperOS 2

Pros & Cons

Oppo Reno4 Z 5G

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
Oppo
Oppo Reno4 Z 5G
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
Li-Po 4000 mAh
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Charging
18W wired
90W wired, 80W wireless
Capacity
5410 mAh
Body 5 specs
Dimensions
163.8 x 75.5 x 8.1 mm (6.45 x 2.97 x 0.32 in)
161.3 x 75.3 x 9.35 mm
Weight
184 g (6.49 oz)
226 g
SIM
Nano-SIM + Nano-SIM
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
Build
Glass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frame
 
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min) Aerospace-grade glass fiber
Connectivity 8 specs
WLAN
Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
5.1, A2DP, LE, aptX HD
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS, GLONASS, GALILEO, BDS, QZSS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
NFC
Yes
Yes
Radio
No
No
USB
USB Type-C 2.0, OTG
USB Type-C 3.2 Gen 2, DisplayPort, OTG
Infrared port
Yes
5G
Yes
Display 4 specs
Type
IPS LCD, 120Hz, 480 nits (typ)
LTPO AMOLED
Size
6.57 inches, 104.2 cm2 (~84.3% screen-to-body ratio)
6.73 inches
Resolution
1080 x 2400 pixels, 20:9 ratio (~401 ppi density)
1440 x 3200 pixels
Protection
Corning Gorilla Glass 3+
Xiaomi Shield Glass 2.0, Mohs level 6
Features 2 specs
Sensors
Fingerprint (side-mounted), accelerometer, gyro, proximity, compass
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
 
Two-way satellite communication (China model only)
Launch 2 specs
Announced
2020, September 29. Released 2020, October 15
2025, February 27
Status
Discontinued
Available. Released 2025, February 27
Main Camera 3 specs
Quad
48 MP, f/1.7, 26mm (wide), 1/2.0", 0.8µm, PDAF 8 MP, f/2.2, 119˚ (ultrawide), 1/4.0", 1.12µm Auxiliary lens
50 MP + 50 MP + 200 MP + 50 MP
Features
LED flash, HDR, panorama
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Video
4K@30fps, 1080p@30fps, gyro-EIS
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)
Memory 5 specs
Card slot
No
No
Internal
128GB 8GB RAM, 256GB 12GB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
 
UFS 2.1
UFS 4.1
RAM
16GB
Storage
512GB
Misc 4 specs
Colors
Ink Black, Dew White
Black, White, Silver Chrome, Green
Models
CPH2065
25010PN30G
Price
About 260 EUR
$ 693.75 / £ 1,295.00 / € 812.34
SAR EU
1.00 W/kg (head)     1.00 W/kg (body)    
Network 7 specs
Technology
GSM / HSPA / LTE / 5G
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 900 / 1800 / 1900
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 38, 39, 40, 41, 66
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
5G bands
1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 77, 78 SA/NSA
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International
Speed
HSPA, LTE, 5G 3.5 Gbps DL
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
Our Tests 6 specs
Camera
Photo / Video
Loudspeaker
-28.1 LUFS (Average)
-24.1 LUFS (Very good)
Battery (old)
Endurance rating 78h
Performance
AnTuTu: 295562 (v8) GeekBench: 2196 (v5.1) GFXBench: 16fps (ES 3.1 onscreen)
Display
1284:1 contrast ratio, 398 nits max brightness (measured)
Battery
Active use score 16:13h
Platform 4 specs
OS
Android 10, upgradable to Android 11, ColorOS 11.1
Android 15, HyperOS 2
Chipset
Mediatek Dimensity 800 (7 nm)
Snapdragon 8 Elite
CPU
Octa-core (4x2.0 GHz Cortex-A76 & 4x2.0 GHz Cortex-A55)
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Mali-G57 MC4
Adreno 830
Selfie Camera 4 specs
Dual
16 MP, f/2.0, 26mm (wide), 1/3.06", 1.0µm 2 MP, f/2.4, (depth)
Features
HDR
HDR, panorama
Video
1080p@30fps
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Single
32 MP
Sound 3 specs
Loudspeaker
Yes
Yes, with stereo speakers
3.5mm jack
Yes
No
 
24-bit/192kHz Hi-Res audio
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

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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.