Never played the Gamecube version but the low-resolution textures bugs me. Wish they bumped up the resolutions when porting it from the N64 to GC.
They didn't port it, the 64 version doesn't have a museum, Blathers, Able's, or connect to Game Boy, thus no e-cards, and no post office connection, and no external clock, as you have to change it whenever you shut it off- batter only saved your town, it didn't run a clock. Ports would be the exact same game, and + is not one.