You would be using the same number of cones.Fixed it for you.
Fresh hops are 80% water, 20% vegatative matter that has the AA and oils.
Dried hops are 10% water and 90% vegatative matter that has the AA and oils.
To get the same vegatative matter, 90/20=4.5. That is where the 4 to 5 comes from.
Commercial growers dry at 140F, which will flash off/damage some of the essential oils. Fresh hops have these essential oils, which I think is part of the flavor they give.