SIHOO Doro C300 Pro V2 vs SIHOO Doro S100: Which Should You Buy?

Key difference: The C300 Pro V2 has 8D armrests where the Doro S100 has 4D, but the Doro S100 has automatic lumbar support.

SIHOO's official store pages are the only source for the C300 Pro V2 and Doro S100 figures below; list prices are the store's regular US prices, and neither chair was tested by Chairpedia.

Why compare them

Why put the SIHOO Doro C300 Pro V2 next to the SIHOO Doro S100? The Doro C300 Pro V2 and the Doro S100 are two upper Doro models from SIHOO at close list prices but with different backrest and lumbar designs.

Specs side by side

Strengths and weaknesses

SIHOO Doro C300 Pro V2

Strengths

• 8D armrests, against 4D armrests on the Doro S100.
• Lumbar you set by hand ("Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels"), where the Doro S100's works on its own.
• A Footrest Version is sold; none is listed for the Doro S100.

Weaknesses

• Lumbar is set by hand ("Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels"), while the Doro S100's moves on its own.

SIHOO Doro S100

Strengths

• Automatic lumbar support ("Dual dynamic lumbar support"), where the C300 Pro V2's is set by hand.

Weaknesses

• 4D armrests, against 8D on the C300 Pro V2.
• No manual lumbar setting is listed for the Doro S100, unlike the C300 Pro V2.
• No footrest version is listed for the Doro S100, unlike the C300 Pro V2.

How they differ

Armrests. The SIHOO Doro C300 Pro V2 lists “8D Bionic Armrests (up, down, forward, back, rotate, or tilt)”, the SIHOO Doro S100 “4D coordinated armrests (Up and down, left, right, forward and backward, tilt linkage); Up and down 2.76 in, forward and back 1.18 in, side to side, rotate 72°”. With 8D armrests the C300 Pro V2 lets you set the pads in more ways than the Doro S100.

Lumbar support. The SIHOO Doro C300 Pro V2 lists “Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels”, the SIHOO Doro S100 “Dual dynamic lumbar support”. The Doro S100's lumbar moves on its own as you shift, while the C300 Pro V2's is positioned by hand.

Footrest. SIHOO sells a Footrest Version of the C300 Pro V2; no such version is listed for the Doro S100.

Price. Both list from $499.99–$549.99 (C300 Pro V2) and $499.99–$509.99 (Doro S100) at regular US list prices. Price options: the C300 Pro V2 — $499.99–$549.99; the Doro S100 — Black $499.99, White $509.99.

Seat size. Seat height: the SIHOO Doro C300 Pro V2 lists nothing, the SIHOO Doro S100 “18.11–21.26 in (46–54 cm)”. Seat width: the SIHOO Doro C300 Pro V2 lists “20.5 in (≈52 cm)”, the SIHOO Doro S100 “20.08 in (51 cm)”. Seat depth: the SIHOO Doro C300 Pro V2 lists “16.9–18.5 in (≈43–47 cm)”, the SIHOO Doro S100 “15.15–17.12 in (≈38.5–43.5 cm)”.

Other details. For the C300 Pro V2 and Doro S100, the table above gives the headrest, recline and chair weight in each brand's own wording.

Same on both. The C300 Pro V2 and Doro S100 list the same warranty (3 years) and maximum load (330 lb, ≈150 kg).

Who should buy which

• Pick the C300 Pro V2 over the Doro S100 if you want 8D armrests rather than 4D.
• Pick the C300 Pro V2 over the Doro S100 if you want a lumbar position you set yourself and that stays put.
• Pick the C300 Pro V2 over the Doro S100 if you want a built-in footrest (Footrest Version).
• Pick the Doro S100 over the C300 Pro V2 if you want lumbar support that adjusts itself as you move, with nothing to set.
• Pick the Doro S100 over the C300 Pro V2 if you want a lighter chair to move around: 49.13 lb (≈22.3 kg) against 59.64 lb (≈27.1 kg).

Not published by the brand (C300 Pro V2 vs Doro S100): seat height for the SIHOO Doro C300 Pro V2.

Sources

• SIHOO Doro C300 Pro V2 (compared here with the Doro S100): Sihoo Doro C300 Pro V2 Ergonomic Office Chair – Official US Sihoo Store, checked 2026-10-08; US list price from SIHOO US Official Store, checked 2026-10-08.
• SIHOO Doro S100 (compared here with the C300 Pro V2): Doro S100 Ergonomic Chair | Dual Lumbar Support & 4D Armrests – UK Sihoo official Shop; Sihoo Doro S100 Ergonomic Office Chair with Dual Dynamic Lumbar Support – Official US Sihoo Store, checked 2026-10-08; US list price from SIHOO US Official Store, checked 2026-10-08.
• Figures marked ≈ for the C300 Pro V2 and Doro S100 are Chairpedia's unit conversions, not brand figures.