@bluesea2010
"crypto ikev2 enabled Outside" enables IKEv2 on the outside interface.
"crypto ikev2 enable Outside client-services port 443" enables IKEv2 and Client Services on the outside interface.
Client Services is used to download client image updates and the anyconnect profile, it is generally recommended to leave enabled.
So use 1, if you use 2 then you disable client services functionality.