here is a link to a comparison http://www.graceframe.com/site/rotarycutting/truesharp

I have both the electric sharpener and the tabletop one. To get the best use out of either of these sharpeners you must not wait to sharpen a dull blade. Sharpen your blades often. They are like your kitchen knives that you sharpen before each use. In order for them to work well they must be kept sharp.