screen is much sharper: it appears to show every pixel. also, much cooler image - maniac mansion splash screen shows bright orange on my pokefami DX, but deep red here.
no dead pixels.
face buttons are closer together.
d-pad is the same size and shape as a real SNES controller, but pretty stiff. needs breaking in.
yoshi's island does not work. loads nintendo logo, then black screen.
super mario rpg works.

gotta go. looks like i'll have to do another in-depth video review like i did with the pokefami dx, but from first impressions, i'm very, very happy with it (mostly because of the screen), yoshi's island aside.