ORIGINAL: fatbill69
It seems to me that the outboard has the advantage of being more versatile. With the inboard, it is very difficult to place the prop exactly where you want it, and almost impossible to raise or lower the prop without changing the thrust angle. My guess is that the outboard will in general be faster than the inboard (with same displacement).
The JAE hulls have the advantage of a known setup. The prop goes "here" and it really works the best in that position.
There is no need to experiment, as the best location is known.
That only leaves the prop as a variable, making it quite easy to run and again, increasing the chance of success for the first timer.
That is not to say that you can't try new things. You can, and we encourage it 100 percent. That's how progress is made.
Joe