~x-ai/grok-latest → A (2:1)

A delivers lasting security/correctness: fail-closed vote actors (no anon fallback), mock-OAuth gating, Secure cookies, tighter return-to sanitization with tests, plus dependency pinning—directly protecting vote integrity. B’s Reddit broker is a real feature with worker/rate-limit/OAuth design and tests, but it is product surface on top of stubs rather than core integrity fixes, and it also carries minor noise (.env gitignore, todo file).