Side A is a coherent architectural fix: it replaces ad-hoc/vestigial vote fields with a proper pseudonym→actor-UUID identity model and uuid-keyed vote dedup, rewrites the storage schema and reducer accordingly, and adds targeted tests validating dedup/rollback semantics — a real correctness improvement to the ranking core. Side B is a useful but more diffuse grab-bag of UI/UX fixes (GitHub resolver pagination and readable bodies, vote-compare next-pair suggestion, login redirect handling) that improves surface features without touching the system's core data-integrity model.
A redesigns core vote persistence: uuid-keyed dedup with rollback/replace, rankings derived from uuid_votes on load, and a seeded pseudonyms map—replacing blind edge merges and vestigial identity fields. B delivers real product value (safer auth next redirects, richer GitHub resolver + paging/bodies, vote-compare next-pair/nav UX), but it is incremental feature/fix work rather than a lasting storage/identity model change.
Side A introduces a fundamental change to vote storage and replay by replacing incremental edge merges with UUID-keyed deduplicated votes, adding pseudonym-to-UUID resolution, rebuilding rankings from stored votes, updating schemas, and changing reducer logic to replace prior votes from the same actor. Side B contains valuable fixes and UX improvements (GitHub resolver pagination/content, vote compare navigation, safe login redirects, and browser flow fixes), but these are incremental features and bug fixes rather than a lasting redesign of core persistence and ranking behavior.