I meant that pastures and barns are the same as in they can house horses, with a few added benefits and downsides eg feeds horses, grow crops, stallions breeding mares, just didn't want to type all that, but should have in retrospect
No, barns you can house stallions and mares together. Pastures you can grow hay if not used by horses, but if you keep breedable mares and stallions together you will get pasture bred foals