OpenRouter: Fusion beats DeepSeek-V4-Pro on substance

Fusion takes the match 34.6 to 32.3 by winning the harder precision tests, while DeepSeek-V4-Pro looks better on presentation and instruction-following in narrower spots. The split is clear: Fusion is the safer model when correctness matters; DeepSeek-V4-Pro is the cleaner stylist when the task is mostly packaging.