There's a couple of AGA games I thought better than the ECS/OCS counterparts (even if I don't cheat by including the CD32 versions). For a start bloodnet was much more playable in it's AGA incarnation, then there's Worm's The Directors Cut (my favourite version of this classic and if I remember rightly an AGA exclusive) and keeping in with AGA exclusives, the text adventure child murder. I was never a text adventure fan in the past, prefering the graphical ones instead but that game for me was like a book you couldn't put down until you were finished with the music and the high-res graphics helping build the atmosphere!
