I don't think the KME edge will last longer if you get a knife equally sharp on the KO. The trick is that there's more skill involved in getting the knife uber sharp on the KO, so Pete may not be getting the knives to the same initial sharpness. It's also possible to burn the edge with the KO if you're not careful, which would reduce edge retention.
One fellow on Youtube did a direct comparison of the two systems with identical knives, getting them to essentially the same sharpness (BESS tested) and the KO edge lasted a bit longer than the KME edge. It's a 4-part video series, so I hope you have a lot of free time.