Ok... as I promised here it is a list with all Lucasarts adventures and their different variations:
--Labyrinth -c64 & apple II version
--Maniac Mansion - original version
--Maniac Mansion - enhanced version (same resolution, bad better colored graphics)
--Mania Mansion - C64 (it has the same graphics as the original pc version)
--Zak McKracken and the Alien Mindbenders - original version
--Zak McKracken and the Alien Mindbenders - enhanced (the same as with maniac mansion enhanced)
--Zak McKracken and the Alien Mindbenders - C64 (same graphics as the original pc version)
--Zak McKracken and the Alien Mindbenders - FM TOWNS version (it's a version for a japanese computer that has much better 256colors graphics - instead of 16colors- that has never been published for the pc, but if you find it you can play it with scummvm)
--Loom - EGA floppy disk version
--Loom - VGA (256colors) CD version with full speech
--Indiana Jones and the Last Crusade - EGA floppy disk version
--Indiana Jones and the Last Crusade - VGA floppy disk version
--Indiana Jones and the Last Crusade - FM TOWNS (it's the same as the VGA pc version but it has the music in much better quality in audio tracks on the cd)
--Indiana Jones and the fate of Atlantis - VGA floppy disk version
--Indiana Jones and the fate of Atlantis - VGA CD version with full-speech
--The Secret of Monkey Island - EGA floppy disk version
--The Secret of Monkey Island - VGA floppy disk version
--The Secret of Monkey Island - VGA CD version (it has the music in audio tracks)
--Monkey Island 2: LeChuck's Revenge - floppy disk version
--Monkey Island 2: LeChuck's Revenge - CD version (It's EXACT the same files as the floppy version with no audio tracks
)
--Day of the Tentacle - floppy disk version
--Day of the Tentacle - CD version (the same graphics but with full speech)
--Sam 'n Max hit the road - floppy version
--Sam 'n Max hit the road - CD version (the same graphics but with full speech)
--Full Thottle
--The Dig
--The curse of Monkey Island
--Grim Fandango
--Escape from Monkey Island
*1* Monkey 1 & 2 cd version were published together on a cd names "Monkey Island Madness", that's why only the first one has audio tracks.
*2* Ofcourse there are versions of other languages (like german or spanish) but I don't count them
*3* The old adventures were publushed also for the amiga and apple computers but I don't count them because they are exactly the same as the pc or the commodore64 (c64) versions. (The apple versions had a filter for the graphics, like scummvm has, but the data files were the same)
*4* There are some more versions of the old adventures but the only difference is the cracked interprenter because some publishers didn't want to print the manuals
(which sucks imo)
*5* The last "Lucasarts Entertainment Pack" has modified interprenters with filters like those in scummvm but the gamefiles are exactly the same. Those modified interprenters are for "The Dig" and "Sam 'n max hit the road".
Ok... that's it... If there are versions that I don't know or there are errors in this list and/or the explanations please let me know
EDIT: I have added the pre-scumm adventure of 1986 "Labyrinth" to the list. I would like to thank KA-su-MA-kun for sharing this information with us.
I have also made some small corrections/additions to the explanations.