[twic]

PTFE also repels oil. That means that the holes in the face fabric and the pores in the membrane don't get clogged up with oil from the wearer's body. Do those other polymers have that property? I honestly have no idea how significant this is compared to the hydrophobicity though.

[snowwrestler]

The PTFE in GoreTex is expanded (ePTFE) and while it chemically does not bind to oil, oil can mechanically clog the pores. For decades GoreTex has had a layer of polyurethane on top of the ePTFE to prevent this.