I was wondering what is the difference between scabies and sercoptic mange?

Closely related. Canine scabies also known as sarcoptic mange is a highly contagious infestation of sarcoptes scabiei canis, a burrowing mite. These mite can also infest other mammals for example cats, horses, sheep, and pigs. In humans scabies is due to a closely related species which is adapted to humans (sarcoptes scabiei, variety hominis).