Sorry Sue, I have been assuming again on unreliable info.
The two seem to be together where I have seen them and as usually the children seem to be lumped together in records I assumed they were brothers.
I still need to find their parents whether they are related or not.I am stuck without a way forward. It doesn't help that I had the wrong parents for the John(b.1725) I thought was their father. At least I can go with the new parents, but then again where are the children of John(b.c.1700) and Katherine Skillicorn ? This maybe where one or both of the 2 boys come from.
Many thanks everyone, I push on with the search. Jean