When you deviate from 3 3/8" pin to pap towards the pap (2") you reduce flare and the ball tends to be earlier and have a smoother response to friction.
When you take the pin the other direction away from your pap (5") the flare is reduced and the ball tends to have more length with a faster response to friction.
Yeah. But when the pin goes below the fingers it reduces flare and lowers the differential which tends to make the ball smoother, not more responsive (75 degree VAL angle is slower off friction than a 25).
Where I think the biggest difference is going to take place is the front part of the lane. The 5 inch pin will still clear the fronts better while yielding a similar backend as the short pin. While similar, the continuation from the pin down 5 inch pin should be slightly more than the short pin because the whole purpose of the short pin is to take any angularity off the backend. Think of backend reaction in this manner:
Short pin: least amount of backend
Pin near palm: more continuation than the short pin but still controllable
Tall pin: the closer to the VAL you get, the more violent the backend.