Haworth Soji vs Humanscale Diffrient Smart

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

Haworth

Haworth Soji

$545

Humanscale

Humanscale Diffrient Smart

$1,987

$1,442

lower starting price for Haworth Soji than Humanscale Diffrient Smart at the brand stores

Differences at a glance

Haworth SojiHumanscale Diffrient Smart

Price: $545$1,987
Seat height: 16.4–21 in (41.7–53.3 cm)16.5” – 22.8”
Seat depth: 16.25–18.75 in (41.3–47.6 cm)16.25” - 18.75” seat depth adjustment range
Load capacity: 350 lb (158.8 kg)up to 400 lbs.
Recline: Tilt tension control; back lock; optional forward tilt by 5°18° recline + 8° backrest tilt
Arms: Fixed arms, height-adjustable arms, 4D arms, and armless options availableFixed Duron Arms / Adjustable Duron Arms / 4D Adj Duron Arms / Armless
Lumbar support: Optional lumbar adjustment for personalized support within a 3.5" rangeTri-panel Form-Sensing mesh adapts its lumbar support to each user (no manual lumbar adjustment)
Warranty: 12 year warranty15-year, 24/7 warranty

From 8 Haworth Soji and 2 Humanscale Diffrient Smart user reviews, most mentioned first. Green is liked, orange is a caution.

Which is cheaper, the Haworth Soji or the Humanscale Diffrient Smart?

The Haworth Soji is cheaper to start: $545 versus $1,987 for the Humanscale Diffrient Smart at the brand stores (Oct 2026).

What do owners mention most?

Price and value for the Haworth Soji, and comfort for the Humanscale Diffrient Smart, based on review summaries.