~anthropic/claude-sonnet-latest → B (3:2)

Side B tightens type-safety across the API layer by threading CanonicalItemUrl through resolve_item, pair-selection, connectivity stats, and rank-change computation, eliminating repeated string-based parse/allocate round-trips and the risk of stringly-typed mismatches. Side A is a solid UI/UX feature (fullscreen compare page, sorted edge history, morph on post) but is more localized and cosmetic (CSS, markup, sort order) compared to B's structural correctness improvement spanning multiple modules and reducing redundant parsing.