Goopydop: I can't see or hear any difference between the floppy and CD-Rom dos versions. At all.
First of all, there are no voiced briefing on the floppy version.
There are also different graphics as you can see there:
http://xwing.wz.cz/graf.html The floppy disk version also has neither the easier missions nor the bonus missions.
The sounds are also different from the CD-ROM Edition. How the floppy disk version sounds depends on the soundcard you select in the setmuse program.
The floppy disk intro (the version for slow machines, which is exclusively on the floppy disk version):
https://youtu.be/3vBtS-RppcA The CD-ROM Edition intro (in German):
https://youtu.be/gkayuJMa0sM The floppy disk cutscenes:
https://youtu.be/7_XKQqSjZuM The CD-ROM Cutscenes (in German):
https://youtu.be/bw7HAMT_O7o