I started out with my Sharpmaker a few years ago and later picked up an EdgePro. It took me a while to gain proficiency with the SM, from not rounding the tip to holding a consistent vertical side-to-side to learning to getting the blade-drop correct through the belly to the tip. The learning curve on the EdgePro is even longer and dealing with all the set-up, water, stone changes, and clean-up takes a lot longer and it's amazing how much you get spread out using all the stuff.
The Sharpmaker gives you two angles to work at--40 inclusive and 30 inclusive. If your existing edge falls somewhere between you can easily sharpen at 40 if that angle doesn't displease you. I picked up both the diamond and ultra-fine hones early on and usually go right to the diamonds when sharpening a blade for the first time on the SM. With the diamonds, re-profiling is not out of the question, but something like M390 is way too much work on the SM.
My preferred edge is a 30 inclusive secondary grind with a 40 inclusive micro bevel. If I re-profile to that, I'll usually do the 30 on the EdgePro and the 40 micro on the SM. From that point forward, the touch ups and re-sharpenings are easy on the SM. For most of what I do on a day-to-day basis, I stick with the SharpMaker and get the EdgePro out on a weekend here and there for more major or multiple-knife sharpening.
For my money, you can't beat the SharpMaker for an entry-level system and it makes a great sharpener for day-to-day work.