As far as I know the only difference is that the music cd's have a tax that go to the RIAA on them. The data cds don't.
As far as compatability there aren't any differences. Although all music cds I've seen have a fairly thick topcoat, where some cheaper data cds have little or none. Just buy good quality data cds and you'll be fine.
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"Empirically observed covariation is a necessary but not sufficient condition for causality" - Edward Tufte
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