~x-ai/grok-latest → A (2:1)

A adds lasting product capability: optional pool-scoped pair selection, constrained next-pair navigation, and a 'vote on children' entry point, with pool threaded through hrefs, post success JS, and UI actions. B’s value is real but narrower—correct delegate attribution, refusing tiny sibling pools instead of falling back to all items, dropping swap, and renaming /vote/compare→/vote—mostly correctness and cleanup on an existing surface rather than new design.