Both oils are good oils.
From the little research I have done on it, Magnatec seems to be between regular Pennzoil Platinum and Platinum Ultra.
I have used some of the older 10w-30 Magnatec blend in my brother in laws F150, did not notice any real difference between it an other oils (but have never noticed any difference between oils in any vehicles).
As mentioned, there are lots of good UOA's with it on Ford Ecoboost engines, and others say it quiets noisy engines of other makes.
I still have 16 qts of 0w-20 and 5w-20 Magnatec from the AAP clearance a few years ago that I will eventually get around to using.