Adobe writes Photoshop native in windows, but since mac moved to Intel, the program functions identically.  I just went through a pc/mac comparison for a new box and discovered the identical configuration in a high-end  box, the mac was more than 3 times the cost of the pc.  That was for an identically configured box, other than os.  I think it is a lifestyle choice.  It is absolutely not faster, or smoother.