The Evo is extremely soft after it breaks in. I personally don't think it has any place outside the park, or if you're a heavier rider, outside of jibbing.
The Proto is softer than the DH2. I'd say the DH2 is a 7 on the stiffness scale and the Proto is a closer to a 5 after it breaks in, which is fairly quick. The Evo is more like a 3 after break in. And with detuned park edges, you don't have the benefits of the variogrip to give you that added control you need on other parts of the mountain.
If you're a lighter rider, and looking for a really soft jib board, you could probably get away with riding the Evo outside of the parks, but if you want something more versatile, I'd go with the Proto.