The Ferrari-like carbon fiber tub is really cool. To choose a 4C over a Cayman is like choosing a Corvette over an R8.
This is a very interesting point! But a Corvette offers 98% of the R8's performance at 50% of the price.
The Alfa isn't that much cheaper than a Cayman. A loaded 4C is near $70k, and that gets you into a Cayman if you wanted.
It does look exotic, but there are so many downsides to it. The typical Alfa build quality, reliability, and resale are a stark contrast to the Porsche.Also, if you're into looks, the 4C looks significantly more exotic and striking.
I still need to go drive a 4C. Local dealer hasn't gotten one in months.