i own a 34 gtt and i've driven my friends 33 gtst and i have to say the 33 has a more racy feel than the 34, but the 34 has a comfortable feel.
both interiors look different but still modern and it all comes down to personal preference.
same goes for the exterior. one is a bit boxier than the other and the other is more round.
like what the other guys said, that extra 10,000 can make a 33 a very nice car and to your standards aswell.