Inconsistent frame rates damage Bayonetta 2. Otherwise it would win easily. I find the fluctuations too noticeable. Mario Karts great. Xenoblade X has stunning environment but is very patchy in other areas. A shame because where it really impresses it's truly stunning.
IMO the best overall is Captain Toad. It had all the slick graphics of SM3DW but improved lighting, had cuter main character animations and a pace of gameplay that lets you really look at how pretty it is - unlike SM3DW where you rush through levels to fast to notice the pretty sights. I feel this is probably why I don't feel it was the ideal graphical style for SM3DW because, although it looked very slick, it looked relatively soulless, but an almost identical graphical style worked brilliantly and seems full of character in Captain Toad.