Depends on which one you like best.
Original reminds me of an owl. The larger one reminds me of a owl with cat with big ears and gorilla feet. Then the 2012 reminds me of a owl-cat.
Inside wise... Very simmilar to an owl minus wings. Although there are images people have made to show what they look like. Then of corse, wiout the fur/plush on the furby itself. I think the most appealing inner look is the 2012... But I wouldn't ever do that to my furby, that would just be weird.