So odd.. the 86S is missing the 2.5 port circuitry so that makes it better for you for some reason?
I had an AX86U and now the GT-AX6000. I noticed very little difference beween them.. The GT-AX6000 is maybe a tad better in the far bedroom. I've used only stock ASUS firmware (latest 388).
I have a small simple setup though. I finally upgraded the wifi card in my laptop to an AX210 and it
nicely speed tests at 920Mbit/sec (1G) on ookla speedtest.. 20ft.. upstairs from the GT-AX6000...that is with a 1200 link rate, 80Mhz channel..
I don't know.
The EE design is slightly different and uses a BCM4906 (dual core 1.8ghz A53) instead of the BCM4908 (Quad core 1.8ghz a53) as a main CPU.
Like I mentioned, the main CPU shouldn't really be impacting "basic performance" as it isn't being offloaded to A53 with light load or a simple speed test (BCM43684 Radio SoC handles this unless it needs to tap into A53).
The larger main chip could be causing EMI, though.. Uses a completely different power adapter as well. 19v2.37a vs 12v3a on AX86S.
It's not a 100% identical layout, but close enough to where you would think things wouldn't be impacted, granted.. there is a different assortment of possible amplifiers for both AX86S/U per FCC certification/photos. Even though they all claim hardware R1.0.
It's possible I have different/subjectively better 5G FEM's, but I think theres something else going on, even if we factor hardware tolerances between units. (I wouldn't imagine over a 10% difference, maybe I'm wrong).
The 2.5G port on the AX86U is driven via Realtek RTL8221B(I)-VB-CG (Newer option) or Broadcom BCM54991ELB0KFEBG (original option from 2020 release). Switching 1G native (4908 driven) to the 2.5G transceiver doesn't improve or net different WIFI results on what my specific sample has inside.
Whatever the case, the AX86S is/was
my best "AX" performer so far. The 2 GT-AX6000 I've tried seem to be in the same ballpark if not a little better than this AX86U at around 30FT distance (fixed wifi card), so at least thats generally consistent.
I bought AX86S as something to mess around with after being disapointed with my first GT-AX6000 relative to my GT-AC2900 (special AC86U)... I didn't expect it to end up as the superior unit (WIFI range, at least subjectively for my home)... The RAM is pretty much saturated with out of box settings.. 400/512mb.
Thats the only thing that bothers me... Wish it had 1GB config.