These two are the types of security protocols used by Mac VPN clients and other VPNs. When speed is concerned, both are equal – both offer about the same throughput. OpenVPN is an open-source code and can be used by anyone. Hence, if you want an easily available protocol, OpenVPN is the right choice to make. For those who are on the move and need to change or switch networks, then IKEv2 is preferred as it allows easy and quick connections.