Force of gravity F(g)

F(g)=GmM/r^2

Generic force accelerating an object

F=ma

We know in a field that F=F(g)

ma=GmM/r^2
a=GM/r^2

So, we know that F(g) is a larger magnitude with a larger m, but that the mass cancels, giving equal a for any m

This does assume that the m in F and F(g) are the same. So far no experiment has shown any difference between the two. The guy who can prove or disprove the equvalence principle will have his name remembered with Newton and Einstein