I kinda agree. I appreciate the i8 and what they are doing there. I also prefer the interior of the i8 to that of the AMG. The i8 is interesting but in a way that people are drawn to it because they are wondering "what is that?!" With the AMG people are drawn in because they think "oh, that's beautiful."
The i8 has a more sleek and sporty design that does draw me in because of it's curves but when I compare them both for performance based on their aesthetics I would choose the GT. Something about it's angular lines makes it look more muscular.
i too considered the I8, love the outside, inside is awful to me..way too futuristic, more like a space ship. I'm not into futuristic things...love those doors though. don't like the fake sounds. The AMG is the real deal...sound and all.