I picked up a new 86U in the hopes of extending my range and having more bandwidth at those ranges. However, I'm noticing there's barely any difference in most cases, and even some cases the 86U is performing notably worse than the 68U on 2.4ghz. I plan to test in more parts of the house, the in a couple main areas, I've been testing and seeing consistent results. I'm using a Galaxy S8 running Wifi Speed Test Pro and running a local server for testing, so I'm not relying on internet speed...
My AC68U is outperforming new AC86U in most tests
My AC68U is outperforming new AC86U in most tests