Well, let's see.
PP&M...three members. KT...eleven. Two-thirds of the current group are ex-Limeliters anyway.
PP&M...two versatile songwriters. KT...one, and he hasn't done a significant song for decades.
PP&M...consistent product. KT...everything from old trad to Beatles to the ghastly "Something Else" album.
PP&M...honoring the old songs while still giving us new ones. KT...the same old same old (how many times can they record "Tom Dooley" anyway?).
PP&M...deeply committed to many social causes. KT...deeply committed to claiming trad songs for themselves so they can get the royalties.

And would you care to compare Bob Shane's ego with Peter's humility?

I gotta tell you, I've enjoyed both groups, seen both in concert, met members of both groups, learned songs from both groups. But you're comparing the Beatles to the Monkees and, while both groups entertained, the Beatles were innovative artists and the Monkees were corporate employees.