None that I can think.

They’re no slower from what I see on daily use and both are privacy focused.

They can remove adblocks all they want.

Private DNS will still exist, there’s at least two that have noads DNS, Mullvad and LibreDNS.

They work in most browser’s/devices etc.

You can try a private DNS, easy to set up in Android and blocks ads in most apps and browsers

Libredns

Mullvaddns