Sensuki
Arcane
It's the small things like pointless changes that are not even listed anywhere, in the first town a paladin gives u a quest to kill some ogres, in EE the ogres are in fixed location in original the ogres ambush you as soon as you enter the zone.
Sorry I think this is incorrect, my BG1 install is the original CD version and location of the Ogres for the quest given by the spear holding plate armored guy in the Beregost southmost tavern is a fixed location. Off the top of my head it's always been on the map where Drizzt is found.
Just double checking and yes, Dudleyville walkthrough confirms it
http://www.forgottenwars.com/bg1/ar4200.htm