On my scandinavian PAL copy of Kirby's Adventure, there are slight differences to the music in Vegetable Valley. Wish I could post the mp3's I've made for comparison, but I find no way to do that..
Anyway, could everybody with a PAL copy put it in your NES and listen to that song, and compare it to the NTSC NSF-file? I am curious if these differences apply to all PAL copies.