honestly, the difference I see in scab vs. screw, the only time you'd find out which one is faster is on a regulated offroad race track, basically, unless you push the truck past the limits, they perform about the same, out in the trails or in the desert, the screw will feel more stable especially sideways, even scab guys who have driven screws have admitted that (this does not mean it is more capable, just more confidence inspiring), I can get 500 miles per tank on a day to day basis in my screw, and everyone gets about average 13-14 mpg maybe a little more, maybe a little less, no matter which cab setup they have, offroad, everyone gets around 6-8 mpg, again, no matter which cab setup, basically, if the scab came with the 36 gallon tank, I would've got it, but knowing I can go those extra 80(offroad)-150(onroad) miles was worth it to me, and honestly, when offroad, 10 miles can make or break your day, a little overkill is a good thing