In case it's of help, I described the differences between 203/2s and Ref 3s....it may not be the exact models you were after, but sonic traits, especially in the upper mid and treble, will be the same.
http://www.whathifi.com/forum/hi-fi/if-i-was-starting-again
Having heard the Ref 1s, I would expect them to have considerably more scale....in fact the specs of them are very similar to my 205/2s.
Amp wise, the quality would need to be similar, but the new Refs are sweeter, so imo match with a wider variety of sonic characteristics. I always felt the previous Refs needed an amp that had a touch of warmth, to stop them sounding a bit forward and lean.
I suspect, if you compared them on a decent system, you would walk away with the Ref 1s.