I haven't used the Wicked Edge but have used the Edge Pro a lot. I suspect that the WE has an advantage other the EP for a couple of reasons. I would think that it's clamping of the blade offers stability, that it can use independent angles on each side as may be required, and that it allows for minimum burr creation through alternating (right then left then right...) strokes being used.
I have no idea if it's lowest angle settings are low enough for our thin knives but I think that I heard that they were going to make the WE adjustable down to a very low angle, you'd have to check into that. The EP doesn't go low enough but you can raise the knife off of the table through the use of a riser block to get the lower angles needed.
As for eyesight issues, that's a problem for sure, but I'd suggest getting a lighted magnifying lamp and sharpening under that. I know this can be done because I used to do it. Also, many sharpeners and knifemakers use those magnifying flip down head piece things over their glasses, they have lighted versions too. I'm certain that you can get past your eyesight problems unless your sight is real bad to the point that magnification won't help.