For all the extra beef on the frame/swingarm is the Attack Trail noticably stiffer than the Mount Vision? It seems to me that the main flex comes from the basic geometry of the frame and the relatively close proximity of all the pivots to each other.
If I had to make a criticism of the Mount Vision its the flex in the rear when you really push it on rough downhills - but as you write in the review that's not necessarily what its designed to excel in and it isn't completely sketchy or unmannered even then. I have taken the harshness out of the ramp up on my Mt Vish by upgrading my Float RL with an AVA air sleeve so that's not an issue either.
Also - any comments on whether the extra weight over say a Mount Vision/Blur/Spesh FSR/Sub 5 is noticeable when you are climbing and/or throwing the bike around?