moving from N66U to AC66U - settings?

I will be switching around 2 routers - changing places.
Both are on the Merlin's 21.
Can I restore settings of one using config. file from the other one?
So, having N66U restored from .CFG that was saved from AC66U?
And vice versa.
DHCP settings are my main concern as I have 31 static IPs.
Thanks for any help.