Petsmart or Petco?????????????? Please help?

I think they are both the same stores, I really dont see the difference. Their are different kind of hamster, there are dwarf hamsters and just normal hamsters. Dwarf hamsters bite a lot, trust me i would know because i had one before, but they are cuter because they're so tiny. But i think if you were to get a hamster, get a hamster, not a dwarf hamster. Petsmart, Petco, who cares, they are the same thing. But, if i HAD to choose, i would choose petsmart