An integral cove is done with a thickened version of epoxy plus sand or quartz. It's troweled on with a cove trowel. It takes some practice and has a very high learning curve. We now can fly creating cove.
As for speed cove, I find it more difficult to use. You have to still prime the wall to stick it on. Cut the angles to fit them as if its regular home depot base molding. Patch all the seams, then coat with quartz or chips, completely not worth it.
Check out this vid, they make it look easy but believe me, it takes some skill.
Hear is a quick pick of cove work