As far as function, I would bet they DO mow better. They are like a discbine cutter head. Our discbine only has 2 blades per head, BUT, they spin at a much faster speed than an average mower, so will have the same effect as 4 on the meg-mo. Our New Holland 1411 discbine has short blades that look pretty much just like the meg-mo blades, and talk about being able to cut at fast speeds! I can cut faster than safe to drive the tractor in a field. What I would be concerned about is blade breakage. We break several blades a season on our discbine, but it has a rubber apron to help stop a broken blade. In a lawn mower, they could be dangerous for anyone within a long range even outside your own yard.