Why use an n/a inlet cam

[Manic172]

Been doing some reading on there and other pages. And it keeps coming up that people have used an n/a inlet cam.
But digging deeper I can't find out why. I tried looking for the cam profiles to see the difference but to no luck.
Can some one throw some light on to this for me

 

[JBRADY95]

Nice car in your profile pic, Ive had 3 Saxos now, awesome little cars!
Anyway, on to the N/A cam. Im doing a fairly big turbo build at mo and using an inlet N/A cam as they give a higher lift and in theory holds boost until higher into the revs and gives a small BHP gain. Will soon see with mine.
But this is stolen from another thread but the profiles/lifts of each camshaft from each engine code

inlet:

058109021 = ADR und AFY 8,78mm, 210°, 4° n.OT
058109021.B = APX, ANB, AEB,APU, AJL, AGU, AQA, ARZ, AJQ, APP, APY, AUL 7,67mm, 190°, 18° n.OT
058109021.K = ADR, APT, ARG, AVV 8,41mm, 202°, 16° n.OT
058109021.M = AWT, AUM, ARX, ARY, AUQ, AMK, BAM, AUL, APP 7,67mm, 190°, 18° n.OT
058109021.F = AGN, APG 8,41mm, 202°, 18° n. OT
058109021.E = AWB 8,6mm, 207°, 9° n.OT
058109021.D = ADR, AGN 8,41mm, 202°, 12° n. OT

exhaust:

058109022.B = AQA, ARZ, AJQ, APP, APY, AEB, APU, ANB, AJL, AWT, AGU, AUM, ARX, ARY, AUQ, AMK, BAM 9,3mm, 210°, 10° v.OT
058109022.C = ADR, AFY, APT, ARG, AVV 10,25mm, 210°, 8° v.OT
058109022.D = AGN, APG 10,4mm, 210°, 8° v.OT__________________

 

[Manic172]

Saxo is for sale. Very high spec and quick.