There is a difference. The Kodak ones have a straight top piece that flips all the way across the top of the holder after you load the film. Some of the others (I have a Carr in my hand now that is in this group) have a partial u shaped piece made of thick wire that serves this purpose.
If you ever decide to stand process, or semi-stand process, the Carr-style hangers will be problematic & leave little ghosts of these u shaped clips on your negs. I haven't had this problem with the Kodak hangers. Or, if they do leave a shadow, it's a straight portion up the side of the neg.
For regular agitation techniques, I've never noticed a difference.