I have heard the Benelli's have the best operation system of all and the gun stays in line, during recoil.

This, of course would increase the rate of fire with accuracy.

I am not sure the pistol grip would improve this, or might hinder it by dropping the hand too far below the line of the barrel, muzzle rise advantage by pivoting on the grip.

You'll find out when shooting it, RIPP.
A good test is 5 or 6 sils. side by side at about 15 to 20yards.
Length of time to hit all.