Office Star ProGrid vs SIHOO Doro C300 Ultra V2

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

Office Star

Office Star ProGrid

$580 – $650

SIHOO

SIHOO Doro C300 Ultra V2

$679.99 – $689.99

$99.99

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

Differences at a glance

Office Star ProGridSIHOO Doro C300 Ultra V2

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

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

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