Stimulants Pervitin and crystal meth

I would like to know if there is any difference between pervitin and crystal meth, besides the form.

if we're talking pharmaceutical drugs, the synonym for pervitin would be desoxyn, which is methamphetamine.

pervitin was originated in Germany in WWII. pervitin is the brand name in Germany/Europe for methamphetamine hydrochloride.

perivitin is a trade name for meth