Ah yes... The N64 version of RE2. While I only played it (and beat it once), I still had just as much fun with it as the PSX original.
There's some debate over which version of RE2 is the best. Let's do a comparison:
Dreamcast: Full screen 60 frames per second FMVs, hi-res character models, low-res backgrounds, Main game, Extreme Battle Mode, Hunk, Tofu.
Nintendo 64: Letterbox 30 frames per second FMVs, hi-res character models, hi-res backgrounds (Hi-res achieved with Expansion Pak), Main game, Hunk, Tofu, EX Files, Devil May Cry control option, Item randomizer, change the color of the blood (Red, Blue, Green, None). No Extreme Battle Mode.
GameCube: Letterbox 30 frames per second FMVs, hi-res charater models, medium-res backgrounds, Main game, Hunk, Tofu, Extreme Battle Mode.
I personally prefer the GameCube version, simply because it controls best on GameCube. I just wish the GameCube version had taken the Full screen, 60 frames per second FMVs from the Dreamcast, and combined them with all the stuff from the N64 version. It'd be the ultimate version of RE2.