theyre pretty similar, but they can still be different in their own way! they can have varying overall size, can have different looking front and hind legs, (larger or smaller arms or paws, claws or no claws, etc)... most of it is really lenient yeah! they just gotta have that general hind leg shape (like the legs beneath the bunched up areas of fur u know lol) ! also they can go on all fours too, its just that they tend to be upright usually ^^ (and, tails and ears can vary alot in shape! you can have different shaped ears like fox ears or bear ears, and the tail can look like any shape, they just gotta have their capsules in them!!)