Haworth Soji vs SIHOO Doro C300 Ultra V2

Side by side from official specifications, sourced prices and User Insights. No written comparison exists for this pair yet.

Haworth

Haworth Soji

$545

SIHOO

SIHOO Doro C300 Ultra V2

$679.99 – $689.99

9 years

longer warranty on Haworth Soji than SIHOO Doro C300 Ultra V2 (official terms)

Differences at a glance

Haworth SojiSIHOO Doro C300 Ultra V2

Price: $545$679.99 – $689.99
Seat height: 16.4–21 in (41.7–53.3 cm)47.5–55.5 cm (≈ 18.7-21.9 in)
Seat depth: 16.25–18.75 in (41.3–47.6 cm)16.9–18.5 in (≈ 43-47 cm)
Load capacity: 350 lb (158.8 kg)330 lb (≈ 150 kg)
Recline: Tilt tension control; back lock; optional forward tilt by 5°Recline Angles 105°, 120°, 135°
Arms: Fixed arms, height-adjustable arms, 4D arms, and armless options available8D Bionic Armrests (up, down, forward, back, rotate, or tilt)
Lumbar support: Optional lumbar adjustment for personalized support within a 3.5" rangeDomino™ Sacral-Lumbar Support 2.0: moves up or down, 3 support levels
Warranty: 12 year warranty3 years (covers manufacturing defects)

Which is cheaper, the Haworth Soji or the SIHOO Doro C300 Ultra V2?

The Haworth Soji is cheaper to start: $545 versus $679.99 for the SIHOO Doro C300 Ultra V2 at the brand stores (Oct 2026).