Take your time and figure it out. Even if you have to cancel your preorder and wait to see one in person first.
I'm in the dilemma where I like the sporty looks and 2 tone of the ST2 seats not to mention partial leather feels sportier to me. Also my nuttsack won't get 3rd degree burns from the full leather. On the other hand, the full leather recaros look great too and I like heated seats for my back.
I'm all about driver feel, so if I can still capture the sporty interior feel with ST3 that's what I'm doing. I need to find an autoshow that has a preproduction over the summer so I can make up my mind.