Configuration- determine what isn’t default

[eponymous]

Hi

I'm planning migrating my current config running on a Netgate SG-2440 to a Deciso appliance (not sure which one yet).

I suspect the hardware is different enough that it would make sense to try and work out what I have configured and set the new device up manually. To that end, is there a recommended way of extracting the "non-default" settings i.e. what I've actually set in a config to make it easier to prompt me what needs setting in the new device?

Or is it possible to just import the current config on the new device after changing the hardware NIC references?

I did have a look through Dustin's excellent write up here: https://homenetworkguy.com/how-to/migrate-opnsense-to-new-hardware/

Just looking for any thoughts on this.