One thing worth adding to any comparison is how you can pay. Mullvad, IVPN, AirVPN and Xeovo all take Monero, so the account isn’t tied to your card at all. I keep a list of VPNs that accept XMR, with their KYC policy: https://xmrlist.com/vpns

Decent enough site once you use its comparisons feature, where it gives more detail.

This is also useful:
https://embed.kumu.io/9ced55e897e74fd807be51990b26b415#vpn-company-relationships

As is this (although a bit limited):
https://www.vpnlocations.info/

Good sites re: vpns are rare.

This site makes note of IPv6 protection but not IPv6 connectivity...it's 2026 man...and it ultimately makes it useless to me