I heard Tuta/Mullvad are quantum-resistant end-to-end encrypted and that Mullvad VPN is better at avoiding trigging captcha.
While Proton services are hosted in Switzerland which has the strongest privacy laws in the world and avoids the surveillance of NATO.
The quantum stuff refers to the theoretical possibility of quantum computers to crack asymetric ciphers like the RSA.
There are new, quantum safe algorithms coming right now, but it’s hot out of the owen so personally I’d wait a bit for the first bugfuxes and such.