sound blaster live 5.1. how many versions?

Hallo group members.

I realize that this is not quite a proper newsgroup for that post but I did not find any other reasonable having the string 'hardware' in its name.

I am going to buy sb live 5.1. I figured out that there are a few versions of the same card, literaly:

first set: Sound Blaster Live! Value Digital CT4830, CT4832, CT4780
second set: Sound Blaster Live! 5.1 Card SB0060, SB0100, SB0102

Could you tell me what is the difference between them ?

regards
Pawel