Teflon is the brand name for PTFE when manufactured by DuPont. Otherwise, they are one and the same. Other brand names for PTFE include:

a. FLUON® is a registered trademark of AGF Ltd.
b. DYNEON® is a registered trademark of Dyneon.
c. POLYFLON® is a registered trademark of Daikin Industries, Ltd.
d. ALGOFLON® is a registered trademark of Ausimont USA, Ltd.
e. INOFLON® is a registered trademark of Gujarat Fluorocarbons India, Ltd.