Humanscale Diffrient Smart vs Haworth Soji XL

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

Humanscale

Humanscale Diffrient Smart

$1,987

Haworth

Haworth Soji XL

$1,545 – $1,760

$442

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

Differences at a glance

Humanscale Diffrient SmartHaworth Soji XL

Price: $1,987$1,545 – $1,760
Seat height: 16.5” – 22.8”16.4–21 in
Seat depth: 16.25” - 18.75” seat depth adjustment range16.25–18.75 in
Load capacity: up to 400 lbs.600 lb
Arms: Fixed Duron Arms / Adjustable Duron Arms / 4D Adj Duron Arms / Armless4D
Lumbar support: Tri-panel Form-Sensing mesh adapts its lumbar support to each user (no manual lumbar adjustment)optional height-adjustable
Warranty: 15-year, 24/7 warranty12 years

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

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