Normal enemies also have higher stats (Base 1.0 stats, enemies on Easy have 0.8 stats) and slightly better drops.
And EP doesn't drop nearly as much on Normal as it does on Easy, and some EP skills are cheaper on Easy.
And you're not penalized an hour for escaping on Easy... really, Easy is just too easy. --- "In peace, vigilance. In war, victory. In death, sacrifice." ~ The Grey Wardens http://www.trueachievements.com/mygames.aspx?gamerid=71900