SIP passthrough and samba server on the TUF are the only differences I can find. The most expensive ASUS routers have these features and so I do not want to miss out if I need them in the future. Why would the GS-AX5400 leave these features out? The GS-AX5400 is also absent from the @asuswrt-Merlin support page but the TUF-AX5400 is supported with a fork. I would appreciate any answers to my questions. EDIT: I feel dumb as I meant to say RADIUS Server NOT samba... apologies.