Yes They Are
Because hamsters are very fat and clumsy, and mice are quick and not (very) fat, I think a mouse would be faster.
No in fact they are the same size of mouses some may be a few feet taller
Gerbils are actually the cross between a mouse and a rat.
Hamster because mice stink and hamster like to play more than mice. If you want a playful pet choose hamster an if you want a pet that will just sit around in the cage then the mouse is for you!
No, hamsters are territorial, the hamster will kill the mouse.
A hamster is larger than a mouse and has a shorter tail.
No at least not to me teddy bear hamsters are the best kinds of hamsters and they are ot "grosser" then a mouse.
It all depends on the breed of hamster. Usually rats tend to be bigger when fully grown than a fully grown hamster. And if its a dwarf hamster the rat is definitely bigger.
Hamster
the mouse
No, mixing different species is not recommended and may end up in the death of the mouse or hamster, or both. The hamster could also chew off the mouse's tail.
the mouse is faster because it smarter