I’ve run both machines currently trying the night hawk

 

The Asus seems to be steady with direct wired but the wifi has been good but not great I have gigabit speed 1000 DL service which wired you get about 930-950 wifi 500-850 depending on the room and phone you have and distance from the router Router down to the box is better than up to the box as a rule. Testing right next to the device varies from device to device time of day and channel there are times I can get 850-900 with the wifi but it’s like the lottery and standing right next to the device. The nighthawk ax8 took some fussing to setup up but it seems to hover about 900-930 wired

Wifi upstairs 600-700 , I was never able to do that with the Asus Also the general rule is 30 ft range for a router I was lucky to maintain speed with the Asus this one seems to maintain a more steady speed at a longer distance Night hawk says it can do link aggregation but you need a compatible switch to access that feature - the Nighthawk app is pretty decent as well the Asus app is comparable. I feel like the Asus tries to do more with less results

 

- both routers have almost Identical specs with a few exceptions but in real world the night hawk is higher speed at a longer distance so far with iPhone 12 Pro Having said that - I had a Samsung S21 ultra to test for a week and I managed 950 from upstairs with the Asus ax88U so it may come down to the antenna in the device to a certain extent