Did you look at http://www.hardcoregaming101.net/blackthorne/blackthorne.htm ?

doesn't even mention pc cd ver.

Always hated the 90's bad CGI look on the 32X and Macintosh versions. The extra levels for the 32X might be cool, but since Blizzard didn't create them they might be out of line with the rest of the game.
As for the CD-ROM version, it may have containted Redbook Audio tracks, although it most probably is just the same game on a plain CD-ROM. Hardcore Gaming 101 is rarely wrong, they usually do their research.

Blackthorne CD version is ~550MB , 1 data track... lots of demos added nothing important...

yes, both versions are exactly the same
The codes are just not properly presented on that site. Some of them are before cutscenes while others are after cutscenes, that is why there are more codes.

My original of Blackthorne has 5 CDDA tracks also. Original big box release.

I have to say Sega32x version is way better - doesn't have that disgusting menu, and the enhanced background doesn't make the game so depressing. The first and last scenery is still depressing but the first one is at least slightly less disgusting.
And snowy mountains are very good.
The minus points for sega are missing scenery animations and ugly waterfalls.

IIRC the game was released under the title BlackHawk in some regions.

I found a PC CD version of the game which seems that the CD is filled especially with demos of other games but I couldn't run it yet.

So, does the PC CD version has audio music? However the floppy version is fantastic with Roland Sound Canvas.

Macintosh version has a sympathetic midi music if you don't put the CD in the drive. If you put it then the fantastic audio music replaces the midi music.