Both work great. Even with its learning curve, you can't beat the EdgePro for simplicity and reproducible results.
The Lansky is more of a pain to set up on your knives; the EdgePro's stones require frequent flattening. The Lansky uses oil; the EdgePro uses water. The Lanksy's stones cut fast; the EdgePro's stones cut much faster. The Lansky will give you a very sharp edge very quickly; the EdgePro will give you a very sharp edge very quickly.
For the looks it will give your knife (while still keeping a hair-popping sharp; scary-sharp; or spooky-sharp edge), you can't beat the EdgePro. If you're sick in the head, you can buy lapping film in finer grits than Ben Dale sells for the EdgePro and get an edge with even more shine.
If you only care about the edge and the rest be darned, MtnHwk has found using a Razor Edge Systems brand coarse hone to grind the relief grind and Spyderco brand Sharpmaker to set the very edge to be a very time and price efficient combo. He grinds in the relief freehand with the coarse hone and then quickly sets the edge with the Sharpmaker. MtnHawk claims the Razor Edge System cuts faster than DMT's 120 grit diamond stone (my drug of choice) and it costs a lot less.
Of your two choices, I've enjoyed the EdgePro immensely. You can also use it sharpen kitchen knives which helps justify its higher cost.
