I've been looking into a 10mm shooter lately and looked up the Glock website and did a comparison of the two above mentioned shooters and found the only difference was 0.18 oz for a empty with mag comparison. The width of the two models in the Glock website is exactly the same. I can reload my G22 gen 4 with different components and equal most over the counter 10mm 180g factory loads which are not all that impressive to begin with. The custom loaded offerings like Buffalo Bore, etc with their 200g loadings are something beyond the pressure limits of my G22 yet it is that loading that captures my eye. I know that the G20 is a large handgun and somewhat wide/thick in the slide ....but I thought one of the advantages of the SF format was to narrow the slide and perhaps to save some weight along with the change. Am I missing something in this comparison ???