To me, the cars are pretty different. I slot the Alfa in between the Elise and Evora. I really like both, but the Elise is much better to drive around. The Alfa is annoying around town unless you put it in all weather mode, it constantly wants to downshift hard and spool the turbo when you just want to get to the next light, its like a child. I did very much enjoy hammering it down PCH in manual mode though, if you keep it in the power and shift manually, its not constantly trying to kill you as the turbo kicks in.
They are both cool, fun cars but I believe generally appeal to two different people.