They changed the visuals and now it's too bright. Your first minutes will be spent oohing and aaahing at the new shiny package but later, you'll begin to question why the art direction has deviated so much from the original's creepier feel (that is supposed to become apparent midway into Combat Evolved's campaign).

It's a classic case of "shiny isn't always better."

That being said, aside from the too-bright atmosphere that's so pervasive it even impinges upon the narrative, this edition's other aspects are superior: Widescreen support, accessibility, etc. You should consider playing this edition as there's a mod that fixes my complaint.