It is strange the ax10000 costs more.
The difference if you read the fine print is it say on 2.4 one is 918 and the other is 1148.
Now mostly this is how big a lie do the marketing guys want to tell.
For a very long time they could not get QAM1024 and 4x4 mimo to work. 918 is qam256 with 4x4.
All this is so they can put bigger numbers on the box for people that think bigger number is always better. Key is your end device is half the connection. The vast majority of end devices only support 2x2 mimo. Also the vast majority only support 80mhz channels and the the 160mhz that makes wifi6 faster.
In addition QAM1024 only really works well very close to the router, you might as well just use a ethernet cable...