What's this CD doing away from Sonic Music?
That's because it's a special Dutch one, that has a contest on the packaging. Also, most of the text is in Dutch too...but oddly some English is sprinkled around like partially on the sticker and "over 70 minutes of music".
When you look at the booklet/insert you can see what you have to do to win, and also the prize list. The translation follows...

18 original dance trax of PURE ENERGY!
Doe mee aan de SEGA Prijsvraag! be : = Enter the SEGA Competition!
Could be multiple ways to translate like "participate in the sega competition". Also some information is lost in this English text because "prijs-vraag" literally translated means "prize question". So you'd immediately know there's at least 1 question to answer to participate.

1) Van welk merk spelcomputer is SONIC de mascotte?
2) Welke 3 tracks moeten volgens jou in ieder geval op een eventuele volgende SONIC Dance CD komen?
3) In hoeveel SEGA spellen speelt SONIC de hoofdrol?

Here's an English translation:
1) From which brand game console is SONIC the mascot?
2) Which 3 dance tracks should definitely be on a potential future SONIC dance CD according to you?
3) In how many SEGA games does Sonic play the main character?

For question 3 it may be important to note that this competition ran until April 30th 1994.
1st prize is a Sega megadrive with a Mega CD and 2 videogames
You could also win
Sonic Ties ("Sonic stropdassen" in Dutch)
Sonic t-shirts
Sonic caps
Sonic calendars ("Sonic kalenders") "
However, it never specified which items you could win (no photos) so, which items are a mystery. Plus, Calendar? Those were never very common anywhere outside of Japan really. Also, it doesn't say how many of each were winnable, (USA contests must disclose how many of each--but this one seems to not have to) so how likely it is that someone who won something sees the entry seems pretty low.