5AC coil springs vs 6AD - whats the difference?

[5W0P3]

I have the 5AC coil springs and a snow plow package.
My neighbor has 6AD coil springs and the camper package.

What are the difference? Which is stiffer if either?

[gsxr1300]

Im pretty sure the camper is stiffer with an extra spring have you looked at them both?

[5W0P3]

These are front coil springs. He does have the overload on the rear. I don't.

[gsxr1300]

oh ok
maybe look at the door sticker and see the weight ratings for the front