ATF: Amsoil Signature vs Toyota WS vs Idemitsu

Wonder how the fully synthetic AISIN AFW+ would hold against the rest. It's a WS compatible oil that I have been using on all my Toyota automatics. The specs are more like a Toyota Dexron IV. I have Magnefine inline to all the oil coolers. The color after sixty thousand comes out remarkably good compared to WS fluid from factory during drain and the performance under hot, high load conditions fare better as well.
I’ve got Amsoil SS blue cap and Maxlife in my 15 Tacoma. Shifts great. I generally change at 30K intervals. This interval will be 70K since every time the fluid looks new. I changed to a deeper pan and plan on keep using Amsoil.