Qwen3.8 27B

User reports speculative decoding with mlx-dspark on an 8-bit target at a 2.45x mean speedup, 8.3 to 20.3 tok/s. Setup is mlx-dspark with a 4-bit target at 1.74x and 25.3 tok/s. The 8-bit target with drafter beats plain 4-bit at 14.6 tok/s.