There's certainly a connection and the two overlap.
I think Ms. Isshak's comments were in this direction. I would discourage you from thinking that somehow coercive control is less, that it's just a step en route to physical violence, which is invariably more serious. Sometimes this behaviour is so enormously degrading and harmful that it eclipses the physical violence in the woman's experience.
But, yes, there's absolutely a connection between the two. It's there. It's omnipresent as the backup to any resistance to the controlling behaviour.