Some consider the Colt OMM to be the finest target revolver ever made, and I am one of them. But I suppose that comes down to a combination of individual preferences of the shooter and how well it fits in their hand. There isn't much difference between the OMM and the Colt Python except for the caliber. In fact the immediate predecessor to the Python was the Colt ".357" which was itself nothing more or less than the OMM chambered in .357 Magnum.