Sizometry

Device summary

Samsung

Galaxy S26 Ultra

vivo

X300 Ultra

Full specifications

Full specifications
Basic information
Release year20262026
Starting price$1,300—
Display size6.9-inch6.8-inch
Dimensions78.1 mm × 163.6 mm × 7.9 mm76.8 mm × 163.0 mm × 8.2 mm
Weight214 g232 g
Front materialCorning Gorilla Armor 2—
Back materialCorning Gorilla Glass Victus 2—
Display
Display technologyDynamic AMOLED 2X with Privacy Display—
Refresh rate120 Hz—
Peak brightness2600 nits—
ProtectionCorning Gorilla Armor 2—
Resolution—3168 × 1440
Performance
ChipsetSnapdragon 8 Elite Gen 5 for GalaxySnapdragon 8 Elite Gen 5
RAM12 GB, 16 GB16 GB
Storage256 GB, 512 GB, 1024 GB512 GB
Expandable storageNo—
Cameras
Main cameraWide · 200 MP · ƒ/1.4 · 2x Optical Quality ZoomMain · 200 MP · ƒ/1.85 · OIS
Ultra-wide cameraUltra Wide · 50 MP · ƒ/1.9Ultra Wide · 50 MP · ƒ/2.0
Telephoto cameraTelephoto · 10 MP · ƒ/2.4 · 3x Optical ZoomTelephoto · 200 MP · ƒ/2.67 · OIS
Rear camera 4Telephoto · 50 MP · ƒ/2.9 · 5x Optical Zoom / 10x Optical Quality Zoom—
Front camerasFront · 12 MP · ƒ/2.2Front · 50 MP · ƒ/2.45
Video recording4K at 120 fps, 8K at 30 fps—
Battery & charging
Wired charging60 W100 W
Wireless charging25 W—
Charging standardSuper Fast Wireless Charging, Wireless PowerShare—
Typical capacity5000 mAh6600 mAh
Rated capacity4855 mAh6395 mAh
Connectivity
Cellular5G, LTE5G, LTE
Wi‑FiWi‑Fi 7Wi‑Fi 6E
BluetoothBluetooth 6.0Bluetooth 6.0
USBUSB‑CUSB 3.2
NFCYes—
eSIMYes—
Build & durability
FrameArmor Aluminum—
Ingress protectionIP68—

Key differences

The most meaningful measured gaps in size and weight — not an overall winner.

  • Weight

    Galaxy S26 Ultra

    18 g lighter

  • Width

    Galaxy S26 Ultra

    1.3 mm wider · minor difference

  • Thickness

    Galaxy S26 Ultra

    0.3 mm thinner · minor difference

  • Height

    Galaxy S26 Ultra

    0.6 mm taller · minor difference

Size in everyday life

Picture it in your front pocket.

Front pocket reference

2018 US jeans study · 20 brands · 80 pairs · Approx. 32-inch waists

Galaxy S26 Ultra

X300 Ultra

Galaxy S26 Ultra vs X300 Ultra Size Comparison

User Experience Summary

Galaxy S26 Ultra

Strengths

  • 60W wired charging — major upgrade over S25 Ultra
  • Privacy Display for commuting and office shoulder-surfing resistance
  • Brighter 200MP main and versatile periscope zoom

Compromises

  • Heavy, wide chassis limits one-handed and pocket comfort
  • Aluminum instead of titanium divides premium buyers
  • Privacy Display trade-offs and S Pen software stagnation

X300 Ultra

Strengths

  • Class-leading Zeiss imaging with 200 MP main and periscope telephoto
  • Sharp 6.82-inch QHD+ AMOLED with adaptive 144 Hz
  • Elite Gen 5 speed with 100 W wired and 40 W wireless charging

Compromises

  • Heavy 232 g phablet ergonomics versus X300 FE and standard flagships
  • OriginOS 6 promotional surfaces at Ultra pricing
  • Thermal warmth during sustained 4K video and gaming

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