The difference with the Mondo clips and the Red Snappers is the dowel part that goes with it. The Red Snappers has a flexible dowel. The clips do not. Also - the RS's dowels are sized a little smaller to take in account for the fabric where the Mondos do not since they're designed for chip bags and whatnot.
I did get the Snappers but haven't put them on yet. I know, I should be smacked. Once I move in to my new quilting room I am going to do all the things that I have put off for so long. It will be like getting a whole new room to play with