Are the Sons of Honor the Offshoot of the Invisagers?

I don't see the sons of honour, necessarily feeling threatened by them. The thing that comes to mind is that at this time, the knights radiant were sort of frowned upon because they had abandoned humanity. So a little bit of a satnis vives ya sit of ya, you can't sa one ether around. They're following the fallen ones. And do we have any clear distinction between what is the goal of the sun of honor versus the invisator?