Sihoo Doro C300 vs M18 Ergonomic Office Chair

The Doro C300 is the more adjustable chair: a flexible triangular back frame, 4D armrests with 75-degree pivot, a 130-degree recline and a headrest that moves in height, depth and rotation. The M18 is the simpler, sturdier-feeling pick, with a semi-firm W-shaped foam seat, dual lumbar adjustment and a strong owner record over years of use. Buy the C300 if you want to dial in fit and recline; buy the M18 if you want a solid, comfortable chair with fewer moving parts.

• Choose the Sihoo Doro C300 if you want the most adjustable fit, with a flexible back frame, 4D armrests and a headrest that adjusts in three directions.
• Choose the M18 Ergonomic Office Chair if you prefer a cushioned foam seat and dual lumbar support in a simpler, proven design with a long record of owner satisfaction.