My original post ment, in an off-handed way, that these two knives are very different. Yes, there are similarities, but size, blade design, lock design, and carry options make comparing these two like comparing apples to oranges, IMHO. I EDC my ATR, but I feel, for me anyway, that the Skirmish is too big for practical, EDC. Yes, the blades are S30V steel, but the ATR is a serrated, modified dagger shape, while the Skirmish is almost an inch longer, reverse-recurve design with no serrations. Yes, they both use the Spyderco opening hole (calling a spade a spade), but the ATR also has a great thumb ramp in the Cobra Hood. Over-all lenght of the ATR is 8 7/16" as opposed to the Skirmish at 9 3/4"- over an inch difference. That might not seem like much, but for pocket carry, it is (to me anyway). Another interesting difference is that although bigger overall, the Skirmish weighs 6.8oz. The ATR lists at 9.75oz.
Another big difference, IMHO, is the Skirmish's Mono Lock (frame lock) and the ATR's Compression Lock. After using knives of both types, I feel that the Compression lock is a better design, both safer to use and stronger to boot, but that is my opinion based on my use, YMMV. The Skirmish comes with a pocket clip that allows it to be carried one way only. The ATR's clip can be changed for left-handed carry. And finally, the ATR retails for $299.95. The Skirmish lists at $220.00. I feel both knives are great designs, and I am waiting to get my hands on the Skirmish and give it a workout. I have been using my ATR for a couple of weeks now and I can tell you it is an outstanding piece of kit that is a great value.