for us market, 3 different ages:
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SB Live
SB Live Value
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SB Live MP3+
SB Live X-Gamer
SB Live Platinum
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SB Live MP3+ 5.1
SB Live X-Gamer 5.1
SB Live Platinum 5.1
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for first age, live and live value is quite different, live comes with spdif in/out panel and live value's spdif header has fewer pins. for second age, all cards are identical, added spdif out jack, just different software bundle, Platinum comes with Livedrive, optional for mp3+ and x-gamer.
for the so called "value" oem card, not necessary identical to the retail card, could be missing digital cd-in and ......