ChangesTwoBowie is also the only CD compilation (that I'm aware of) that contains the DJ 7" edit also. I could be wrong about this though.

The sound of the RCA CDs are fine, but if you listen on headphones, you can catch some of the muddiness that was later cleared up on the reissues. I think its most noticable on Sweet Thing/Candidate/Sweet Thing on the Diamond Dogs RCA version.

I'd kill for a copy of Station to Station and/or ChangesOneBowie from the RCA catalogue. Particularly Station To Station, because I like the original monochrome cover better, and I think it better suits the album.

Did EMI ever release a ChangesTwoBowie? According to the compilations index on AllMusicGuide they did, with quite perculiar tracklisting:
1. Oh! You Pretty Things (Bowie)
2. Life on Mars? (Bowie)
3. Starman (Bowie)
4. Hang on to Yourself (Bowie)
5. Aladdin Sane (Bowie)
6. Fame [Original Version] (Alomar/Bowie/Lennon)
7. Fascination (Bowie/Vandross)
8. TVC 15 (Bowie)
9. Sound and Vision (Bowie)
10. Helden (Bowie/Eno)
11. DJ (Alomar/Bowie/Eno)
12. Scary Monsters (And Super Creeps) (Bowie)
13. Under Pressure (Bowie/Deacon/May/Mercury/Taylor)
14. Cat People (Putting Out Fire) (Bowie/Moroder)
15. This Is Not America (Bowie/Mays/Metheny)
16. Loving the Alien (Bowie)
17. Absolute Beginners (Bowie)
18. Strangers When We Meet (Bowie)

A counterfiet/pirate compilation maybe? I've discovered no official information on it anywhere.