Yeah, they got crazy with their names for the Live!. The only real difference is between the Live! (plain Jane), and every sub-named Live! (MP3, 5.1 Digital, Gamer, Platinum, Platinum Gamer).
The Platinum added a front mounted 5.25" bay breakout box. MP3, Gamer, Platinum Gamer (as well as Platinum) have digital decoding, but not sure if they have digital output (I assume they would though, since they came out after the 5.1 Digital). The 5.1 Digital has digital output for 5.1 audio.
The plain Jane Live! doesn't have the digital output, so the best you can get with it is analog 4.1 sound.
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