Are they both the same except for passthrough power socket in PA9020P? Can I mix and match both types and get the same performance as using all of one type?

Anton L.Z. wrote Hi 180511 is for EU version, for US version, the latest one should be 170627. Interesting. But that means that the US version that I bought (it is clearly labeled as such on the box)...

The latest TL-PA9020P KIT(US) V3 firmware listed on the TP-Link site is: 3.2.4_902103_170627_902 I updated one of my adapters thinking I was getting the latest firmware. But when I checked the other...