champion plugs

You can tell that the best plug is what has worked best for each of us which seems to be a different plug. Rumblefish360 is right, just try them one at a time and see which one works for you. But try them apples to apples, same heat range, electrode style, etc.
FYI, NGK V-Power racing works best in my race car, all last season on two sets of plugs (still have the second set in the car). I have Champion Platinum in my wifes Concorde. I use Autolites in my Cherokee. It's what seems to work for me.

Although generally I am not a fan of Autolites, "It Auto lite but it don't" but they are in on of my cars, so they can't be that bad.

So to answer you question it is true that MOPARS run better with Champions, for some people.