Dolphin isn't a N64 emulator you are comparing apples and oranges. Just because it happens to be able to run some games because a official wii n64 emulator (which has many documented cases of being inaccurate in certain games fyi) exists doesn't make it a N64 emulator, hence this comparison is dumb. And seem to look better could also be of some adjustments to the games on nintendo's side to make them usable with higher resolution and whatnot