I have several Fatboy Razors, from each year. I also own Slim Adjustables, and Black Beauty Razors. By far, the Fatboys give the smoothest shave, because of the head design. I cannot tell any difference in shaves between the years. My preferences go to the D and E coded ones, with the removable, not pressed on, end caps. They are easier to deep clean, and work on. . It's always my go-to travel razor, when I don't find a way to take my Straight Razors.