What are the differences between PTFE tape and Teflon tape, and which one is more suitable for plumbing applications?

PTFE tape and Teflon tape are essentially the same thing, as Teflon is a brand name for PTFE. Both tapes are used for sealing pipe threads in Plumbing applications. PTFE tape is more commonly used in plumbing due to its higher density and better sealing properties.