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Sony Xperia Z4 Ultra
Sony Sony Xperia Z4 Ultra
2.4
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 Sony Xperia Z4 Ultra Xiaomi 15 Ultra
Display size (in) 6.44 6.73
Charging (W) 18 90
Main camera (MP) 16.00 50.00
Chipset Qualcomm MSM8994 Snapdragon 810 (20 nm) Snapdragon 8 Elite
OS Android 5.0 (Lollipop) Android 15, HyperOS 2

Pros & Cons

Sony Xperia Z4 Ultra

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
Sony
Sony Xperia Z4 Ultra
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
Li-Ion 4000 mAh, non-removable
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Charging
18W wired, QC2
90W wired, 80W wireless
Capacity
5410 mAh
Body 5 specs
Dimensions
-
161.3 x 75.3 x 9.35 mm
Weight
-
226 g
SIM
Nano-SIM
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
 
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
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 Direct, DLNA, hotspot
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
4.0, A2DP, aptX
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS, GLONASS, BDS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
NFC
Yes
Yes
Radio
FM radio, RDS
No
USB
microUSB 2.0 (MHL TV-out), OTG
USB Type-C 3.2 Gen 2, DisplayPort, OTG
Infrared port
Yes
5G
Yes
Display 5 specs
Type
IPS LCD
LTPO AMOLED
Size
6.44 inches, 114.3 cm2
6.73 inches
Resolution
1080 x 1920 pixels, 16:9 ratio (~342 ppi density)
1440 x 3200 pixels
Protection
Shatter proof glass
Xiaomi Shield Glass 2.0, Mohs level 6
 
Triluminos display X-Reality Engine
Features 2 specs
Sensors
Accelerometer, gyro, proximity, compass, barometer
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
 
ANT+
Two-way satellite communication (China model only)
Launch 2 specs
Announced
Exp. announcement 2015, Q3
2025, February 27
Status
Cancelled
Available. Released 2025, February 27
Main Camera 4 specs
Single
16 MP, AF
Features
LED flash, HDR, panorama
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Video
Yes
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
16GB 3GB RAM, 32GB 3GB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
 
eMMC 5.0
UFS 4.1
RAM
16GB
Storage
512GB
Misc 4 specs
Colors
Black, White
Black, White, Silver Chrome, Green
Models
25010PN30G
SAR EU
1.00 W/kg (head)     1.00 W/kg (body)    
Price
$ 693.75 / £ 1,295.00 / € 812.34
Network 7 specs
Speed
HSPA 42.2/5.76 Mbps, LTE Cat4 150/50 Mbps
HSPA, LTE, 5G
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 / 1700 / 1900 / 2100
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
 
1, 2, 3, 4, 5, 7, 8, 17, 20
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
4G bands
1, 2, 3, 4, 5, 7, 8, 13, 17, 20
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, 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 5.0 (Lollipop)
Android 15, HyperOS 2
Chipset
Qualcomm MSM8994 Snapdragon 810 (20 nm)
Snapdragon 8 Elite
CPU
Octa-core (4x1.5 GHz Cortex-A53 & 4x2.0 GHz Cortex-A57)
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Adreno 430
Adreno 830
Selfie Camera 3 specs
Single
Yes
32 MP
Features
HDR, panorama
Video
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Sound 3 specs
Loudspeaker
Yes, with stereo speakers
Yes, with stereo speakers
3.5mm jack
Yes
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

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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.