I ran the same Qwen3.6-35B-A3B at 256K context on an ASUS GX10 and a 64GB M2 Max. The main gap was prefill. The Mac needed 23–28 minutes before the first output token. Full results: 1. Prefill At 128K: GX10 TTFT 45.7s vs Mac 552.8s. Decode: 40.6 vs 28.7 tok/s. At 256K: GX10 127.5s vs Mac 1,541s median TTFT. Decode differs 1.4x. Prefill differs 12x. 2. MLX 4-bit beat 3-bit, 6-bit AND 8-bit 4-bit: 76 tok/s, 3/3 coding, 12/12 retrieval. 3-bit: failed executable coding in every single seed. 8-bit: half the speed and worse retrieval (mangled citations, 9/12). 3. MTP is not a free speed switch Same model, same Q4_K_M, same coding task, 3 seeds: GX10 CUDA: +26.9% decode. M2 Max Metal: −19.4%. Correctness held for both (12/12 executable) but speed didn't. Code: Raw dataset: