Both engines will make more power, and both will see changes, but a turbo or supercharged engine will with no doubt see MORE power from a cooler temp... especially a intercooled forced induction...

Not only does the turbo have MORE air to compress which means it heats the air up a fraction of the normal amount, which is a greater drop than just ambient change. so already, right there forced induction tops n/a temp change, then you have an intercooler which uses ambient air to cool the charge even more, so what does this mean? The intercooler will be cooling the already cooled charge an even greater amount.


Simplified - Dont look at final temp goin into the engine as the story teller, look at the difference in temps. NA, sees a temp drom from 90 to 30 degrees... 60 degrees for all you highschoolers...
Forced induction - very very different on engines but Ill pull some numbers out of my ass.. 20psi out of a t3 - 278* cooled to 160 by an intercooler... temp outside drops 60 degrees the charge coming from the turbo will drop more than just 60 degrees, so lets say... hmmm... 90 so charge at 20psi out of the t3 is 188 then the COLDER intercooler cools the charge the same amount, effiencey stays the same.. well atleast in my demonstraition for ease and not wanting to type anymore it will so it cools it to 70 degrees... now that is 90 degrees in a total difference... more than the N/A saw... and with this being boosted, wouldnt there be even more of it noticed since its compressed air and not just being pulled in the engine by pressure drop??? more oxygen and a colder temp...