There might be differences when the shoe is flailing around but I'd expect it to be similar to be honest. They are mega expensive though! And if you get just the cleats you don't get the tiny rubber thing which closes off the gap underneath the cleat so you have to buy the whole system really.
Did the new Speedplay aero pedals in CFD:
https://www.facebook.com/AeroCoach/posts/1098380433529928
There might be differences when the shoe is flailing around but I'd expect it to be similar to be honest. They are mega expensive though! And if you get just the cleats you don't get the tiny rubber thing which closes off the gap underneath the cleat so you have to buy the whole system really.