SIHOO Doro C300 Ultra V2 vs Office Star ProGrid

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

SIHOO

SIHOO Doro C300 Ultra V2

$679.99 – $689.99

Office Star

Office Star ProGrid

$580 – $650

$99.99

lower starting price for Office Star ProGrid than SIHOO Doro C300 Ultra V2 at the brand stores

Differences at a glance

SIHOO Doro C300 Ultra V2Office Star ProGrid

Price: $679.99 – $689.99$580 – $650
Seat height: 47.5–55.5 cm (≈ 18.7-21.9 in)19.5–23 in (50–58 cm)
Seat depth: 16.9–18.5 in (≈ 43-47 cm)19.5” D; Seat Travel: 3.75”
Recline: Recline Angles 105°, 120°, 135°2-to-1 synchro tilt control with adjustable tilt tension
Arms: 8D Bionic Armrests (up, down, forward, back, rotate, or tilt)Height adjustable arms; Arms Max Inside: 19”; Arms to Floor Min: 25.25”; Arms to Seat Min: 6.5”
Lumbar support: Domino™ Sacral-Lumbar Support 2.0: moves up or down, 3 support levelsBreathable ProGrid® back with built-in lumbar support; Ratchet back height adjustment

Which is cheaper, the SIHOO Doro C300 Ultra V2 or the Office Star ProGrid?

The Office Star ProGrid is cheaper to start: $580 versus $679.99 for the SIHOO Doro C300 Ultra V2 at the brand stores (Oct 2026).