RE: String Loops... YES or NO???
I'm not exactly sure how the knotless works, but it has a loop at either end. It's string, like the other.
The knot that ties the loop together is a "clove hitch." It's one of the strongest knots out there. It looks weak, but it pulls tight on itself and, if tied correctly, will never fail. Never. This is a very common knot in the fire service, so it must work.