Float might be more similar than you think. I don't expect either of these to be really deep snow skis despite what 'ole Gamme says. We have much better options in the US and Canada for stuff like that I think.
I think you will really love the new NATO skis. When you get them, handle them back to back and play with them a bit, just so you can get an idea of how much better balanced, smoother flexing and lighter the new ones are. Careful with the edges too!
I'm actually on the verge of getting a small wax pocket with the Ingstad. I don't think my floor is flat enough to tell for sure but I had my wife check earlier, she could slip a paper in right in front of my toes (I was standing where I would mount the bindings) and slide it back a little, I could breath and it would slide back, so it's right on the edge. It's a good spot, it's where I want it.
Crazy thing is, I get the same thing with vintage skis. No wax pocket with half my weight. So despite the way they flex up to a particular gap, I think near 100lbs or a little shy, they are closer than you might think.
I don't know what I'd call the vintage ski. It doesn't really feel like double camber, and it doesn't look like it when you flex it tip to tail, at least it doesn't look the same as the other ones I have. It might just be a really stiff single.