Yeah, they look great on the truck! Was an impulse buy at the hobby shop, was in for something else and saw these so grabbed them. And yes, I remember you mentioning the six pack's, essentially the same thing, different tread pattern is all.
Definitely a soft compound, although Duratrax lists them as their sport compound. Softer than the backflips and trenchers.
I wouldn't run these on the tarmac, they'd get chewed up pretty quick in my opinion.
Trenchers or Trencher X would be a good option for multi surface. I have them on most of my RC's. They work well on the road, grass & dirt as well as jumping, for the way that I run my rigs anyways.
I do really like the Backflips on the Outcast though.