WireGuard is faster.  OpenVPN is better for Tor, as you do not get the speed benefit of WireGuard->Tor.  WireGuard has the IP stored in memory for 2-5 min depending on the provider, but this isn't that big a deal to most people, as they can see your IP anyway.

Please see: https://simplifiedprivacy.com/vpn-protocols-which-one-should-you-use/