A lot of you asked the same thing after my last chair video: how does the Welax S9 Pro compare to the Sihoo Doro C300? So in this one, I put them side by side after actually using both in my daily workflow—multiple long sessions, not just reading specs. I break down price ($399 vs ~$279), assembly (about 30 minutes each), and the big feature differences like the Welax footrest, seat depth adjustment (Welax has it, Sihoo doesn’t), and how the recline mechanism feels when you’re actually leaning back. Then I get into what matters: comfort over hours. The Sihoo headrest was harder for me to dial in, and the lumbar support didn’t push back enough for my lower back—especially after long sits (I’m sensitive here because I’ve had lower back issues). On the Welax, the headrest lines up more naturally, the lumbar feels better over 5–6 hour days, and the footrest changes reclining from “okay” to “actually relaxing.” I also had a friend test both, and they came to the same conclusion: both are decent, but the Welax S9 Pro is the easy daily pick if you sit for long hours and want comfort without constantly fixing your posture.