It depends on how much more money you are willing to spend to get one of those road reliable.
If they are different models one K and one F, the current owner has likely determined they can't assemble one complete bike from the two.
If they are derelicts, expect to spend another $1000 to get one road reliable. You will have a nice, fun bike after that. But, you have to decide if these bikes are worth that to you.
If you expect to flip them for a profit, then you will need to part them out.
A lot depends on what is missing from each to make them 100%.