With the Lansky, sometimes the knife would move on me. The clamping/holding device is the weak point of the Lansky.
If you go with the Edge Pro, just get the 220, 400, and 600 stones. You can run the stones dry for the last few passes which acts as a finer grit.
Also I like the fact the Edge Pro does not have preset angles. Can quickly touch up a edge with small change to the angle creating a slight compound bevel, it's basically the same thing as touching-up with a ceramic rod.