Falco: flown 660+ hours on a factory series 3 (experience on that one curtailed by a con-rod failure on climb-out...
http://www.aerofun.ch/falco-1.html) and a series 4.
Notwithstanding the sissy wheel upfront, cruise performance on a O-320 was slightly superior to an RV, logical when looking at the sharp wings and tail, and the retracts.
Talking about the retracts, electrically actuated, with a delicate screw mechanism.
Roll feel was similar to an RV say -4 or -6, but pitch was nicer in giving a better response to speed. The Falco is more stable, a superior IFR platform, yet still almost as aerobatic. The cockpit itself is more cramped, luggage space similar to side by side RVs.
Panther: couple of hours flown on a Corvair powered LSA version. It is an LSA and feels like one, everything is light ... nice mimicking of the RV-3, when seen from a distance.
Advantages: quick built using pulled rivets, inside space. The cockpit has a good size which most of you would fit in. Foldable wings, though the fuel tanks are in the wings...
Performance is good considering the 120HP Corvair, but quite noisy with the high revving motor (2850-3300RPM cruise setting). Flight controls kinda mushy compared to an RV, long wings and short wheelbase could lower one's xwind limits.
As a whole, a nice little "cheap" quick-built RV-3 replica, the 2 seater Cougar still being in the works.