Generally I would go for the more recent standard, but the TL-PA9020P has pretty bad reviews:

Very poor results across the board, not what we expected to see from this 2000Mbps rated set!
https://www.avforums.com/review/-.12664

Leider erzeugen die Adapter ein hochfrequentes Surren. Dieses ist auf eine Distanz von 1-2 Metern hörbar.
https://techtest.org/das-tp-link-powerline-2000-kit-tl-pa9020p-kit-im-test-powerline-mit-2000mbits/