Question on Surf SOHO config files

In a previous Forum question I learned that a config file from a 2nd generation Surf SOHO (HW2) can not be imported into a third generation (MK3) SOHO. Now, I have a client with a first generation Surf SOHO that needs to be replaced. Can its configuration be imported into either a 2nd or 3rd generation Surf SOHO?
Thanks.

Do you know the SoHo mk3 is now EOL after 8.3.0?

I am aware of this. Still, I expect the SOHO will be useful for many years. Not for everyone, but for some.