Sansa Clip 1st Generation, determining V1 and V2

SanDisk MP3 players Sansa® Clip | Sansa® Clip+
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But that’s an issue between the Clip and the Clip+, and not between v1 and v2 of the Clip, right?  I wasn’t aware that there was any functional difference between v1 and v2 of the Clip (including sound), from the user perspective.