I ran the numbers assuming the same tires on all three bikes. Adusting my nuimbers to standardize the results to what Gunnar gives, I see:
Gunnar's trail - 61
Both Trek' and VO's 55
So, using the same tires for comparison, the Gunnar will be the most stable and the other two very close to each other. The VO will have a little more wheel flop. The bikes aren't very different. Here, wheelbase is a lot more different than the front end geometries. I"d look at that and balance between the wheels if I were l,inintingmy choices to these three bikes. (But at 4" difference in wheelbases, you are kinda comparing comparing a compact with a luxury car and saying they are not that different; they have the same number of turns of the steering wheel, lock-to-lock.)
Ben