I have run both the N1 cams and 20V cams and would never run the 20V cams over the N1 cams.
The area under the curve arguement does not work with the 20V cam and here is why.
The 20V cam is stronger than the N1 cam up to about 6000 RPMs and then the N1 cams take over. Now if you shift the cams at 8500 RPMs the average drop from gear to gear is about 2500 RPMs. So after 1st gear at all points and time the N1 cams will make more WHP. 20V cams will not out muscle N1 cams.
Now some 20Ls and N1Hs would be a great way to go.