I compared Warcraft 2 CD Audio to SC-VA and apparently the CD audio uses all the SC-XX models for various instruments in the same track and each instrument is equalized differently.
So it is not a simple direct SC-88 recording, they probably used the SC-88Pro and recorded each instrument separately from the 55,88,88pro map that sounded the best to them on that particular instrument.
I can hear instruments that sound closer to the SC-55, they tweaked each instrument in their recording software and mixed them all together.
The instruments are definitely from the sound canvas units but the mix is different and not a straightforward recording of the 88 model.
EDIT:
On a closer listen, most if not all instruments are from SC-55, especially the "Trombone" "Choir Aahs" "French Horn".
If I would have to give a verdict, I would say that the CD Audio is a studio remix of SC-55 instruments with carefully balanced EQ and Effects crafted for each instrument.
Blasphemy I know, everyone says it's the 88, but there are some instrument that are radically different between the 88 and the CD track, where the 55 is much closer.