Yeah, something I'd like to put on my list. The "best" sound card for each game.
Probably the games with soundtracks that use the most instruments are the ones with the biggest difference.....question is what games are those? Shouldn't be too hard to identify tho. You can find which games use MT32 by searching your DOS directory for the "MT32" and then I guess running each one. (This of course won't get them all, like MI1. Searching for "Roland" and "LAPC" would probably be good too)
Out of my collection Sierra games are probably the common game that everyone has and the biggest # of games that have MT32.
List of games with the MT32 driver:
4D Boxing
Aces over Europe
Altered Destiny
Betrayal at Krondor
Castles 2
Capitalism
Conquests of Camelot
Dungeon Hack
Ecoquest
Elder Scrolls: Arena
Extreme Assault
Eye of the Beholder 3
Fantasy Empires
Gamma Wing
Gateworld
Incredible Machine 2
Indiana Jones and the Fate of Atlantis
Jagged Alliance
Jagged Alliance Deadly Games
Mario Teaches Typing
Mechwarrior 2
Menzoberranzan
King's Quest 1 New
King's Quest 4
King's Quest 5
King's Quest 6
King's Quest 7
Legend of Kyrandia
Leisure Suit Larry 3
Little Big Adventure
Lord of The Rings Two Towers
Martian Memorandum
Monkey Island 1
Monkey Island 2
Monopoly Deluxe
Mortal Kombat
Police Quest 2
Police Quest 3
Quest for Glory 1 new
Quest For Glory 1
Quest for Glory 2
Quest for Glory 3
Quest for Glory 4
Sam & Max Hit The Road
ShadowCaster
SimCity 2000
Simon the Sorceror 2
Space Quest 1 New
Space Quest 3
Space Quest 4
Space Quest 5
Teenage Mutant Ninja Turtles
Terra Nova Strike Force Centauri
Transport Tycoon
Ultima 7
Warlords 2
Wing Commander Academy
XCOM Enemy Unknown