LOL untill I read your reference I was like "What's he on about??"
A very good example... I'd reckon that there must be individuals in the Ordo Malleus, who is on par if not better than your average* grey knight.
Perhaps the best of the inquisitor lords?
It's also true that inquisitors have different specialities. I'm even lead to believe that a Crimson Fist would fare just as good as a Grey Knight if the opponent is an ork, so there you have it