Results should be rather similar between the two sets.
They will help with low to mid-range power. We have not tested with them in our shop on a stock vehicle to provide any further information than what the manufacturer states.
Dyno graph for the aFe Headers: https://www.morepowertuning.com/afe48-43031#tab-7
Per the product page: Works with Factory Exhaust System with No Modifications Necessary