SIHOO M18 vs Humanscale Diffrient Smart

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

SIHOO

SIHOO M18

$289.99 – $299.99

Humanscale

Humanscale Diffrient Smart

$1,987

$1,697.01

lower starting price for SIHOO M18 than Humanscale Diffrient Smart at the brand stores

Differences at a glance

SIHOO M18Humanscale Diffrient Smart

Price: $289.99 – $299.99$1,987
Seat height: 44–54 cm16.5” – 22.8”
Seat depth: 17.91 in (≈ 45.5 cm)16.25” - 18.75” seat depth adjustment range
Load capacity: 330 lb (≈ 150 kg)up to 400 lbs.
Recline: Maximum 126° recline angle18° recline + 8° backrest tilt
Arms: Adjustable armrests (Up and down)Fixed Duron Arms / Adjustable Duron Arms / 4D Adj Duron Arms / Armless
Lumbar support: Lumbar support adjusts vertically and horizontallyTri-panel Form-Sensing mesh adapts its lumbar support to each user (no manual lumbar adjustment)
Warranty: 3 years15-year, 24/7 warranty

From 5 SIHOO M18 and 2 Humanscale Diffrient Smart user reviews, most mentioned first. Green is liked, orange is a caution.

Which is cheaper, the SIHOO M18 or the Humanscale Diffrient Smart?

The SIHOO M18 is cheaper to start: $289.99 versus $1,987 for the Humanscale Diffrient Smart at the brand stores (Oct 2026).

What do owners mention most?

Price and value for the SIHOO M18, and comfort for the Humanscale Diffrient Smart, based on review summaries.