The Epic 4G looked like my almost perfect phone coming from a G1. It had the keyboard, 4" AMOLED screen, 1GHz processor, etc. Only downside is that it was quite a bit thinker and heavier than the non-keyboard Galaxy-S.
Have purchased a regular Galaxy-S I know that weight shouldn't be too bad, since the non-keyboard phones are ridiculously light. I don't miss the keyboard too much because with Swype and a larger screen I can type reasonably fast, though there are situations where I wish I had a physical keyboard (check out Kwak arena ; ).
What also makes the Epic 4G standout is that it has the forward facing camera that other US Galaxy-S don't have. I'll miss that as well. Also heard that Samsung has fixed the pesky GPS problem on this phone. That would have been a bummer for new owners. Hopefully I win the contest and will be able to play with both phones.