ASUS - ZenWiFi AX Wireless-AX Wi-Fi Router - White

Yes XT8

This would out perform the wifi modem provided by Spectrum. Juts set the modem in bridge mode then disable the wifi from the unit provided by Spectrum or exchange it for a modem only and save the extra rent for the wifi. The AIMESH works as intended but uses the 2nd 5ghz band as backbone to main station, using a ethernet backbone provides even better wifi experience.

It’s a solid and feature rich router. There is like 40 connected devices in my network and It gives me 3x better speed than my previous AC2700 router. I also have an access point (ASUS ac1900 router) connected to it using Ethernet which handles all my smart/2.4ghz devices well. Complaints: I had to reboot it couple of times so far, once in a while rebooting actually helps refreshes your system, there is an option so it can be scheduled. Sometimes the devices wouldn’t get connected to the nearest node or router I had to bind them. It seem it settling down well with no or less issues.

It's WiFi-6

Yes. These are identical and both can act as the main router. I have one xt8 connected to the modem, ethernet backhaul to the other xt8, 1 ethernet backhaul to the 1st xd8, and 2 wireless xd8 backhaul.