Andtha: IMHO, the EGA version is the best version and if you play LOOM, you should play the EGA version first.
According to various sources, the VGA as well as the FM Towns version are censored. It may not be much, but it will change the impact of certain scenes. What is censored? In one scene (only one, yes) there is no pool of blood, in fact there is no blood at all. The EGA version has that blood, and it certainly caused an immersive response when I played it... All the other scenes with blood were left untouched.
Also, the FM Towns as well as the VGA versions are missing one audio track from the original EGA version, the Overture, which is a two minute MT-32 MIDI track at the beginning (in the patched EGA version, as the original release accidentally skipped it too).
I played the EGA version with a MIDI soundfont, e.g. configuring fluidsynth to use soundfonts on Linux or - and I never tried that by myself, but it should be possible - in ScummVM directly, or using a Windows software like CoolSoft VirtualMIDISynth (highly recommended for both ScummVM and DOSBox). The Overture is, simply put, stunning!
The VGA CD version is the worst, it removes dynamic music in favour of being fully voiced, but IMHO the dynamic music is much better for a game like LOOM. If they wanted a talkie version, they shouldn't have cut the dynamic music, which they had to due to the limited resources of that time. IMHO they shouldn't have made it at all, because of this compromise.
Additionally, the VGA version (both, floppy and CD) has lots and lots of missing scenes, especially close-ups.
In any case, the EGA version is the only complete version. The FM Towns version comes close. The VGA version is a mess, it souldn't ever be considered to be a complete version.
Some people prefer the EGA version, some the FM Towns version. GOG.com should include both!
Resouces:
Comparison of EGA and FM Towns version:
https://www.movie-censorship.com/report.php?ID=378995 Comparison of FM Towns and VGA version:
https://www.movie-censorship.com/report.php?ID=802320 Fouther information on the differences:
https://www.movie-censorship.com/report.php?ID=802320 <rant>one would think that the readily available plethora of wisdom and info with the advent of the Internet/Web would set things somewhat right... but the thing is people don't change so easily</rant>
let alone you could play say the FM-TOWNS and the VGA talkie versions and judge it yourself - the game is *this* short anyway.