I don't know. My experience has been the opposite. The edge retention on my 561 seems to be better than on my s30v blades. I recently used it to skin, quarter, and cut up two aoudad sheep on a hunt in West TX. These animals are a little larger than whitetails, and have thicker, tougher skin and hair. Afterward I still had a good working edge. But, I touched up the edge on UF sharpmaker stones anyway. Then, I used the 561 to clean, and cut up some very tough Sheep head fish. They have very thick scales and bones which normally dull a knife very quickly. The 561 did excellent during that use. The blade didn't appear to suffer any damage. I've used my 561 also for opening and cutting up large boxes on several occasions. The edge retention seems very good to me, better than my s30v blades. Plus, I use it around salt water, with no signs of rust. I do rinse with fresh water and dry it off after being out on the boat though. I've not had trouble sharpening the 561, or my 551 either. They seem to take a nice hair popping edge. It does take a little longer to get the edge than on my vg10 or s30v blades. But, I expect that. In fact, I like Elmax more than the m390 blades I had. I traded most of those off, and only have a pm2 with m390 now. The only steel I have that I prefer over Elmax for edge retention is my cpm m4 blades. I LOVE m4. It will hold an edge it seems like forever. The only thing I don't like is that it will try to rust on me around the salt water. So, the Elmax, s30v, vg10 and H1 get the fishing and boating duties.