it looks like a direct port from the SNES version of super Mario all stars. The snes verson had some graphics and audio tweaks and I can't swear by it but luigi looks less like Mario (at least to me). I didn't get the anniversary edition I got the Nintendo Selects re-re-rerelease.
I have the anniversary edition and it's a nice little package. It does come with a soundtrack that contains music from Mario games throughout its history but they're short since they loop relatively quickly.