I’d go with a single unit of the EBM68 simply because it’s the only one in the family (for now) that has a 2.5Gbps WAN port which will allow you to get the Gigabit broadband in full (though it will be hard for you to test that behind the router since it only has Gigabit ports). As for VLANs, that works in my testing and is fairly straightforward. Good luck!

I am trying to understand which ExpertWiFi product(s) are what I need. I get 1Gbps (up & down) from my ISP. I currently only have 2 WiFi 6E clients (Several 6, 5, and 4) and I am wanting to be able to setup VLANs in my 1200 sq ft apartment. The ExpertWiFi line seems to have everything I need, but I am unclear If I am better to use 1 EBM68 or the EBR63. I would also consider and likely prefer using the EBG15 and placing an EBA63 more centrally.

I’m just trying to maximize what I have. Any advice would be appreciated.

Yes, that’s the case of all Asus routers with Dual-WAN, Bennet. I generally would check and mention the exceptions.