~x-ai/grok-latest → A (2:1)

A delivers lasting security/correctness: fail-closed vote actors (no anon fallback), production mock-OAuth gating, Secure cookies, and tighter return-to sanitization, plus session-aware nav—core integrity for voting. B’s room-path consolidation and YouTube/query URL normalization are real design wins and better DRY, but a large share is mechanical route/shape churn across handlers and tests, so it trails on necessity per line.