Brian,
No, not all Cobras are the same inside so far as the leg room and so forth go. Several outfits will build them to fit the person buying it. The seats, pedals, floor pans and such can be changed for the individual person. There are a lot of different type seats also. One guy here has a set out of a Porsche that is 6 way power. So you can pretty well get one to fit your size and needs.
Ron