I couldn't see a big difference in cutting with that PMN chain, I tried a loop when it first came out, it doesn't hold up as well as the regular 3/8 Picco, unless Sthil has improved upon it, since it was first introduced .
It was introduced to go with the low end consumer saws, that don't crank out the high rpm the pro saws do.
I only run that PMN narrow kerf chain on our power pruners.
Larry