The Competitions are nicer than the Racers. They're finished better and have brass bushings rather than plastic. One in each pair has a slotted mount that acts like a drop bolt. It's too bad they require unobtainable double ended bridge wires, but I make them out of cable and brass tubing.

I have to admit that neither of my French bikes has the original Mafacs. I put Campagnolo on the Peugeot and Dura Ace on the Gitane. I'm using the Competitions on the Carlton. It needs long-reach brakes.