I think the Attacks are the best pants available mainly due to the side zips and comfort. The mountain pants are super nice too, if they had side zips they would be right there with the Attacks. But the Mountain pants fit a little more roomy for guys with big legs whereas the attacks have a more "athletic" fit. As far as uses, they both have roughly the same amount of insulation so they're a toss up.
Bottom line is you can't go wrong with either and you'll be happy with whichever one you choose.