Proton VPN stands out because it is open source, unlimited, and for those who don't have the means to pay, truly free (it doesn't have ads, and we don't monetize through selling user data). Unlike other VPNs, we also make heavy investments in overcoming censorship and trying to bypass internet blocks in authoritarian countries.
Mullvad is the go-to for torrenting since it is very privacy focused, has easy to use port-forwarding and great performance. It depends on how many devices you need, since Mullvad only provides 5 connections. Realistically, you can't go wrong with either. Both will do the torrenting job just fine. jBO41.