I once owned a Joe Breeze Lightning Mtn Bike that had the Breezer rear dropouts and at the same time owned a Joe Breeze Storm Mtn Bike that had standard Ritchey dropouts. Otherwise, the bikes had the same frame tubing (Tange Prestige).

I couldn't tell any difference in riding or handling. I think they are pretty to look at, but that's all the value there is to them.