I just started using my 3.5 and 5.1 in 20cv and they're great compared to my Bark River's in S35vn. Neither steel has had any corrosion issues, but the edge retention and toughness seems for me to go to 20cv. I've chipped and rolled the edges on my Bravo 1 in S35vn and have yet to do so in the Survive! knives. However, I will admit that even though I've done similar tasks with the Survive blades as the Bark Rivers. I don't have the same amount of time behind the 20cv steel as I have the Bark River's in S35vn. I have actually given the Bark River Bravo 1 in S35vn to my 7 year old to use on our hike, backpacking, and camping trips because it requires less maintenance than the 3v blades. I also have a Benchmade Sibert 162 in S30v and I like the 20cv thus far over that steel as well. The only downside is if you let the 20cv get a little dull without touching it up it is more difficult to bring back the edge than the other two options. I had to use my DC10 and strop to bring back the edge on the 5.1 versus most of the other blades a quick strop will do after last weekends backpacking trip. However, I could easily go through an entire weekend of camp chores without any significant issues or dulling of the 20cv. I brought my DC10 and strop just in case, but didn't have to use them, until after we got home. The vast majority of my fixed blades are in 3v and I really like that steel for it's toughness, but I always have an issue with a little patina and little spots forming on the steel during use in semi-wet environments.(It's not a deal killer by any means because I'm still a fan of 3v) However, I'm starting to use my stainless blades more often during backpacking, hikes in the Sierra Nevada, fishing trips, and when I head to the ocean, or anywhere I think the blades might get a little wet or damp. I'm definitely going to carry my 20cv blades during my winter hikes, snow shoeing, and camping. However, there's nothing wrong with S35vn, but if I had to choose moving forward in stainless blades I'd stick with 20cv.