RE: 2 cycle vs 4 cycle
I know that there are examples of the opposite, for example my MVVS .91 is real torquer but my ABITAR 1.20 fourstroke is a revver, it will turn a 14x6 APC at 12,000 plus but can't handle a 15x8.
As you say the general rule is that the fourstroke will have a broader torque band.