not a tough call at all. cayman.
Well I dunno, how many of us have driven a 2014 Cayman or 2014 C7? Let alone both! Hell, how many have even sat in both?
It's pretty tough to state with any certainty how you'd spend $53k USD unless the cars serve completely different purposes. (ie. Yukon vs. Vette).
Case in point: I was 99.9% certain I would buy a 2010 GTI 3 yrs ago, but a test drive of the WRX blew me away. Enough that I could live with the relatively shitty interior.
Same applies here I think. I 'believe' I'd prefer the Porsche's interior, handling, "feel", etc. But maybe the C7's performance is so mind-blowing (not to mention it's other improvements...), I couldn't help but pick the Vette!
So yes, I prefer the Cayman, but it ain't a slamdunk.