I'm not trying to be controversial, but imho, the steel used in the Tenacious has a couple of major drawbacks you may want to consider.
I used a Tenacious when I worked nights in a warehouse (which involved mostly opening cardboard boxes, a bit of prying, cutting tape, twine, and celophane). I would have to sharpen the knife after every single shift because it would become too dull to use safely after as little as one night of work. I found that the steel was easily chipped, especially if I nicked a staple or bit of metal when opening a box.
Eventually I got tired of sharpening it, sold it, and started using my Kershaw Cyclone instead (which has Sandvick steel, like the Skyline). The cyclone could go a week or more without needing sharpening, doing the same amount of work each night as the Tenacious. When I would nick a staple with the Cyclone, the edge would not chip as the Tenacious did. Furthermore, I didn't find the Sandvick steel to be any more difficult to sharpen than the Tenacious' steel.
In short, while I think it's entirely up to you to decide whether you prefer the respective ergonomics, design features, and aesthetics of the Tenacious or Skyline, I think that the Skyline uses much better materials.
Hope that helps you decide!