Gudadantza: But, frankly, is there any notable difference between the DOS an Amiga version? In a lot of games the Amiga version is superior and in that case the addition of the amiga version via ScummVM would be convenient.
Cadaver747: Amiga versions are better than DOS versions for games released before 1991 (most of the time), but in case of Elvira series I think all 2 or even 4 games, if we count ...A Personal Nightmare (1989) and Waxworks (1992), are better on Amiga, even though it's the same composer / sound programmer Dave Hasler in credits to Elvira 1 for both Amiga and DOS versions.
Amiga version has different sound track and it's much better than DOS even if set up for MT-32 or General MIDI (MT-32 / GM music is not bad but it's really weak in comparison), also the Amiga version has additional sounds like the wolf howling in intro and a small piece of voice over for Elvira upon first meeting, check this out and see for yourself:
DOS Music comparison (Sound Blaster vs MT-32) - in order to change Sound Blaster to MT-32 or GM (music for these should be identical) you need to run the setup.exe file under DOS or DOSBox, see attached
https://www.youtube.com/watch?v=Jylat9ndsGE DOS Intro (on Sound Blaster):
https://www.youtube.com/watch?v=8wjzeHJCy_g Amiga Intro - notice the huge difference in tone and atmosphere, additional sounds like bells and wolf howling and Elvira little *speech* part, the music is grim and dark fitting the dire situation pretty well in my opinion:
https://youtu.be/7Y1bPz8AERE Watching the videos, indeed the music, at least in Elvira 1, is superior in Amiga. Now the matter is to know if the ScummVM compatibility is well enough. I think so, but maybe it is not perfect.
Yes, if it were possible it would be a good candidate for the Amiga version in extras.