2020 GMC HD Reveal

I was skeptical at 1st on the GMC as I (along w/ many others) didn't think too highly of the Chevy version. After looking at both videos, the GMC is one sharp looking truck for 2020. Now my question is: Did GM re-do the frame is some fashion to increase their tow numbers? Reason I ask is, if the D-max hasn't changed with it's HP & TQ numbers, what did GM do to increase things? Anyone notice as well that on the dually, there are only 3 bolts that attach the aux spring hanger to frame?