The stage 2+ ed30 'should' be faster than stage 2+ S3 when moving due to weight differences and 4WD 'bogging' power on the S3 (although the gen 4 haldex is better at this). In the real world, my stage 1 REVO remap only ed30 is very slightly slower than the stage 2+ s3 when moving - its just the messy launch of the ed30 that would let it down in 1/4 mile times and any racing...
as said above, I find the lack of traction a little annoying particularly when out driving with my mates s3

but think im going to do 4 pot brakes and handling improvements on the ed30 rather than going to stage 2+ as I think that would benefit it more for control in corners etc rather than chasing 1/4 mile times on a fwd car

will do me for a year or two then hopefully move up to a RS3 or something with decent 4wd system and mod capabilities!!