OK the reason it will run a lil better is becuase of timing advance in a aftermarket PCM. i think intense is +3 degrees. they adj tranny kickdown enable fans to run sooner etc

3.4 inch pulley + approx 25 WHP
3.25 pulley +approx 35-40 whps

i know the second one is more accurate because a local perf shop ownder has a ssei and did a baseline dyno and then swapped and dynoed again same day......he has no other mods.