It revs much nicer... lower c/r and lighter weight of internals...
Power/smoother too early to tell... it hasn't gone above ~4.2k rpm so far.
Driving impressions, you definitely feel the engine a little better with non-stock engine mounts... we ran Legacy ones which are softer than Gruppe N but still do the job... well at least for now... will see how they last. Everything else I would say needs more tuning... so once again needs more time
Once the hair dryer is hooked up it sure is going to make more power... then its dyno time... will see numbers instead of words.