Vitra Physix vs Humanscale Diffrient Smart

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

Vitra

Vitra Physix

From $1,520

Humanscale

Humanscale Diffrient Smart

$1,987

$467

lower starting price for Vitra Physix than Humanscale Diffrient Smart at the brand stores

Differences at a glance

Vitra PhysixHumanscale Diffrient Smart

Price: From $1,520$1,987
Seat height: 390–510 mm16.5” – 22.8”
Seat depth: 435 mm16.25” - 18.75” seat depth adjustment range
Recline: Synchronised movement, individual adjustment of backrest resistance and locking device in upright position18° recline + 8° backrest tilt
Arms: Flexible frame and armrests in polyamide (deep black or soft grey)Fixed Duron Arms / Adjustable Duron Arms / 4D Adj Duron Arms / Armless
Warranty: 5 years15-year, 24/7 warranty

Which is cheaper, the Vitra Physix or the Humanscale Diffrient Smart?

The Vitra Physix is cheaper to start: $1,520 versus $1,987 for the Humanscale Diffrient Smart at the brand stores (Oct 2026).

What do owners mention most?

Adjustability for the Vitra Physix, and comfort for the Humanscale Diffrient Smart, based on review summaries.