Both great just different. I am not skier enough at my speed and longer line length to journey too far with this, but have skied both 66 A3 and 2013 Strada in both 66 and 67 lengths. Nuances I will leave for the Horton's and MattP's and Dirt's and Jayski and the other mega ballers. From the few sets on each trying to determine which one of the two I would continue to ski and grow on this summer here goes. A3 rides what feels a bit deeper. An easy fun ride that turns well and gets wide but is a touch more work rolling from pulling edge to pre-turn edge behind the boat...probably just me. Possibly the width on the new A3 don't know but best left to the real guru's to answer. A3 in a 66 seemed very close in length with the 67 Strada at least laying them side by side at a glance. The 66 Strada is an incredibly quick turning ski that because of my inept ability would sometimes stall in the turn where the A3 would keep moving through it. For the guys that are dialed with their technique I can see where it would rock their world. The 67 Strada was instant balance, angle, felt faster and just easy. The A3 was also easy in some aspects. Liked them both but would pick the 67" Strada. It turned like a well controlled 66 with the balance I needed from the flat spot or rocker design. It was less work and the edge change for me was easier. The quick fin measurements with an old Goode dial caliper were .745 dft 2.50 depth and 6.855 length wing 9 Boot 29.25 water temp 68.