Can't add anything for the first question, but as for the second >what does this do better than pi-hole does? I block or redirect a few external DNS servers,

Can't add anything for the first question, but as for the second >what does this do better than pi-hole does? I block or redirect a few external DNS servers, like Google's, to a local DNS server and some devices go absolutely abeshit if the reply doesn't look like they expect. Like thousands of DNS lookups in minutes. Enough to kill pi-hole both on an RPI4, but also running on the same server as Technitium (dual Xeon proliant). So it seems it is more robust?