all games are not created equal

They are pretty much the same game.  One big difference though; Quake Live is totally free and can be played from your browser.

Quake Live is meant for everyone and not only the hardcore FPSers.  This includes even those who may be totally new to FPS games.  Before you start playing, you have to complete a training course and a one on one match with a bot to determine your skill level.  Then after that, whenever you play online, Quake Live will try and match you up with people of your skill level.  Aren't able to rocket jump?  Have trouble keeping the lighting gun on your target? No problem!  The players you'll be put up against may have the same problems =)

Yea, the tech running Quake 3 is old.  The graphics are clearly dated.  But who cares, it's still a lot of fun to play!  And now, it's right at your fingertips, no matter where you are.