Haworth Soji vs SIHOO M18

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 M18

$289.99 – $299.99

9 years

longer warranty on Haworth Soji than SIHOO M18 (official terms)

Differences at a glance

Haworth SojiSIHOO M18

Price: $545$289.99 – $299.99
Seat height: 16.4–21 in (41.7–53.3 cm)44–54 cm
Seat depth: 16.25–18.75 in (41.3–47.6 cm)17.91 in (≈ 45.5 cm)
Load capacity: 350 lb (158.8 kg)330 lb (≈ 150 kg)
Recline: Tilt tension control; back lock; optional forward tilt by 5°Maximum 126° recline angle
Arms: Fixed arms, height-adjustable arms, 4D arms, and armless options availableAdjustable armrests (Up and down)
Lumbar support: Optional lumbar adjustment for personalized support within a 3.5" rangeLumbar support adjusts vertically and horizontally
Warranty: 12 year warranty3 years

From 8 Haworth Soji and 5 SIHOO M18 user reviews, most mentioned first. Green is liked, orange is a caution.

Which is cheaper, the Haworth Soji or the SIHOO M18?

The SIHOO M18 is cheaper to start: $289.99 versus $545 for the Haworth Soji at the brand stores (Oct 2026).

What do owners mention most?

Price and value for the Haworth Soji, and price and value for the SIHOO M18, based on review summaries.