All I know is that Caves looks much better now, specially because of the lightning. It was a map I didn't play in in the original, but that I'll play in GE:S.
The layout of the original as interesting, but the lightning, coupled with the game's tendency to lag really made it annoying. It is very good to see that this isn't mere "copy-paste", but a reinterpretation of the original map. Kudos to Loafie, hero of dreams for this remake.