Difference between "Small Dog" and "Large Dog"

Not much really. Small dogs can go under couches and beds, larger dogs can't. Since the bark is set in cas to what you prefer there's endless bark options to make a small dogs bark match that of a big dog of wanted and vice versa. I don't notice many differences in behavior because they really do tend to operate by traits and quirks rather than size or breed.

Sizes would change how much room they take up on furniture or bed size. Size doesn't seem to matter much to the gp.