+400ftlbs makes up for having a couple more rotating pounds. You could make the same argument heavy brake rotors. As with everything YMMV. With a power car the gains are diminishing.

if you have the power, getting/keeping the tire on the ground after a bump and in general being easier on the dampeners is where a light combination is beneficial.

I ran STC/STF with 135ft lbs... so yeah loosing 12 lbs/wheel(!!) was noticeable. in my +250ftlb SRT4 or Focus ST, i have better things to worry about. I suspect the same is true for the barracuda.