As long as you're using a standard stock, this is true.
Comparing the ergonomics of the two with a pistol grip, the 870 is better for the forefinger safety.
A pistol grip on the Mossies requires a grip change to manipulate the safety - slowing you down.
Comparing the ergonomics of the two with a pistol grip,
We dont care for pistol grips on shotguns. Some do, I know and God bless them.
Best,
L