Well, if you want to mention that, the Gamecube versions of several later games, such as Timesplitters: Future Perfect, lacked online. That was considered pretty significant in 2005. The Gamecube versions of some games also had bugs, similar to how the PS3 and PC versions of current-gen titles have bugs, while the more popular ports did not. I remember my brand-new, scratchless copy of The Incredible Hulk: Ultimate Destruction freezing up quite a few times. I'm sure audiophiles can sense the sound difference between compressed sound on Gamecube versions and full DVD-quality sound on PS2/Xbox versions.