I think the OP has long decided, but for the sake of the original question:
It is an apples and oranges comparison except that the oranges in the guise of AT3W win it handily, so long as you get the P-metric version.
The AT3W, even when P-metric, are very, very tough tires, which the Conti AT are not. The Wildpeak are excellent in rock. On the 4Runner, I don't air them down for rocks at all. No punctures or issues (in rocks that are too much for stock OBs and some that are too much for any Subarus). Yet, on pavement the Wildpeak are absolutely silent (at least on the 4R) and handle and corner well.
For some reason, the Falkens are also quite cheap as far as quality tires go.
Wear will depend on use. Go off-pavement regularly and wear will be quick. It is inevitable. I get great mileage from road-only tires, but it has been quick wear for Geolander ATS, KO2s, Conti ATs, and Wildpeaks alike. I did get good wear from Toyo AT II on the B9 but that car did far less offroad than the OB, not to mention the 4R.