They are vastly different games sharing only the title. Choose based on platform priority:
Pros: Open neighborhood (seamless travel), full 3D graphics, deeper trait/skill systems, Karma Powers (god-mode abilities), 2-player local co-op, better UI with controller.
Cons: No Create-a-Style (color/pattern tool), smaller town (Sunset Valley only, no expansion worlds), limited save slots (3), occasional frame drops, no mods/store content.
Pros: Portable, touchscreen-centric UI (drag furniture, draw paths), unique "Karma" mini-games, distinct story-driven goals.
Cons: Tiny world (single lot + rabbit-hole venues), 2D sprites/pre-rendered backgrounds, very limited CAS (no sliders), stripped skills/careers, no open neighborhood, clunky pathfinding.