Mario Kart 8 Deluxe and Deltarune got tested by Isaac and Riperi previosly (His video: https://www.youtube.com/watch?v=GEVre_0ZVUg )
Captain Toad, Cuphead and Animal Crossing I tested myself (side-by-side Video comparison: https://youtu.be/auNS9MmZMPI )
Additional information:
Cuphead has flickering issues with certain UI elements on Vulkan via MoltenVK. Metal fixes those and introduces no new issues, according to my testing.
Animal Crossing is accurate, except for it having broken backgrounds in interiors, causing them to appear as white instead of black. This is caused by a hardware level sampler bug, that isaac never got to find a workaround for.
However, this issue happens with Vulkan via MoltenVK as well, both Metal and Vulkan have this issue, therefore Metal shouldn't have any downside compared to using Vulkan in this game.
