This is a good fight between Smith who is currently a domestic level Cruiser weight and Ducar who has fought a lot of good fighters on the road and tested them all.
Both of these fighters have fight changing power though Smith is generally a bit better at landing it. Ducar has faced the better competition and fared decently well which gives him a lot of experience coming into this fight. Chris Billam-Smith is the home fighter and has had a full training camp while Ducar has come in on short notice which may make a difference. I think skill wise they are fairly similar.
I think this fight will end in a knockout but I honestly can’t predict with certainty who will win. I lean towards Billam-Smith because hes had the longer training camp and should be more prepared.