SIHOO Doro C300 Ultra V2 vs Haworth Soji

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

SIHOO

SIHOO Doro C300 Ultra V2

$679.99 – $689.99

Haworth

Haworth Soji

$545

9 years

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

Differences at a glance

SIHOO Doro C300 Ultra V2Haworth Soji

Price: $679.99 – $689.99$545
Seat height: 47.5–55.5 cm (≈ 18.7-21.9 in)16.4–21 in (41.7–53.3 cm)
Seat depth: 16.9–18.5 in (≈ 43-47 cm)16.25–18.75 in (41.3–47.6 cm)
Load capacity: 330 lb (≈ 150 kg)350 lb (158.8 kg)
Recline: Recline Angles 105°, 120°, 135°Tilt tension control; back lock; optional forward tilt by 5°
Arms: 8D Bionic Armrests (up, down, forward, back, rotate, or tilt)Fixed arms, height-adjustable arms, 4D arms, and armless options available
Lumbar support: Domino™ Sacral-Lumbar Support 2.0: moves up or down, 3 support levelsOptional lumbar adjustment for personalized support within a 3.5" range
Warranty: 3 years (covers manufacturing defects)12 year warranty

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

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