I don't think so. Equal pressure on identical thicknesses of forcing cones would result in increased stress on the smaller diameter cone...since we are now discussing an equal force distributed over a smaller area..But let's proceed....what happens if you now double the pressure on the smaller-diameter cone?...
Sonny..
We are not discussing "equal force distributed over a smaller area." We are discussing pressure. Pressure is force per area. If the pressure is constant, and the area is doubled, the force is doubled.