Configuration backups and new hardware

[jimk2048]

Hello Folks,

I have OPNsense 19.7 running as a KVM domain\guest with a LAN and WAN interface.  If a new VM is created with the same VM configuration, except with 3 interfaces: LAN, WAN and wLAN, is it a good idea to apply the configuration backup to the new VM? 

If restoring the configuration backup is not a bad idea:

Would it be better to restore the configuration and then start adding configuration for the wLAN interface?

Or, would it be better to do 'basic' configuration of the LAN, WAN and wLAN and then apply the restore?