I'm stealing the bit from Retrogaming Times. "The Many Faces of" was one of my favorite articles. Comparisons of the same game for various systems. Ordered from worst to first. Here are the various versions of Pac Man for classic systems. No homebrews or hacks allowed. These are the versions I've played...please let me know if I missed any.
Atari 2600 - People like this version for nostalgia's sake...but it's not a good game. Main sins: Pac Man doesn't face up or down. No fruits. Weird colors. No intermissions. Sounds aren't even close to arcade.
The "also rans":
VIC-20: They tried. But it's too choppy to be fun. And the maze is way too small.
TI 99/4A - Looks GREAT. But way too slow and easy. And the lack of multi-channel sound hurts it.
Atari 8-Bit: The game is good. Great graphics, great sounds. But no intermissions. Game is easy.
Commodore 64: Almost identical to the Atari 8-bit version. No intermissions. Too slow and easy.
NES: It's really good. But Pac Man and the ghosts are way too big. Plus the game is slow.
5200: They took the 8-bit version, added intermissions, and ramped up the difficulty. It's great. But those controllers will cause you to die sometimes.
Intellivision: I'm giving this version a medal for technical achievement. it's amazing how good this version is, given the hardware. Control is no issue. Tight and fun. It has intermissions. The sounds and graphics are great. I love this version so much.
Sega Game Gear - It's just about perfect. The screen scrolls, but that's ok.
Colecovision: It's a prototype. It should have been released because it is AWESOME. It's so fast. There are intermissions. Ghosts have eyes. Amazing.