I have BOTH a 9mm AR and the Evo Carbine.
Price: Wash. By the time you build a complete 9mm AR, you're at about a grand. Mags are cheap for both (Evo: $20, ASC AR mags are $14).
Ergos: Wash. AR is familiar to most, LRBHO works on the AR if you use Colt mags. Evo ergos to me are great out of the box, but some change the safety and grip, which are both cheap.
Reliability: Evo by a mile. ARs usually require some tinkering to get the BHO to work, and some are plagued by all sorts of issues. Bolt catches tend to break unless you tune the buffer. That said, do it right, and they are 100%. Evo had a bad run of magazines, but the issue is not nearly as widespread as many would have you believe - new production mags are 100%. Careful what you read (i.e. above) - there are no hammer issues or cracked part issues, unless you count a sample size of one or two.
Lego-ability: AR wins here by a long shot, but the Evo is slowly catching up. Evo has various grips and safeties now, handguards coming, but no barrels yet.
Recoil: Evo wins, by a good margin. The AR recoils harder.
Suppressor-friendly: Evo by a mile. The Evo is queiter, and has zero gas to the face. I shoot mine without glasses. I've tuned my AR to have almost no gas to the face, but it's noticeably louder.