Originally Posted by Dutchrudder
What exactly is the issue for you here? They play different positions, so obviously it won't match up perfectly. The author is trying to compare and contrast two of the best defensive players in the NFL, who coincidentally were both drafted in 2011. They both play 90% of their team's snaps (which is probably why Aldon Smith was left out of this), and they both make a tremendous impact on what appear to be the top two teams in the AFC.
Watt clearly does not generate as much pressure as Miller on a per play basis. It's a fact, regardless of what their sack numbers are. Sacks are overrated, because a QB pressure that leads to an incompletion or an INT doesn't show up in the stats. Stat geeks like PFF are trying to change that perception with the type of stats presented in the article, because QB pressures and hits are often overlooked.
That line I quoted shows that 20.5% of the time Miller rushes, he disrupts the QB, whereas 12.2% of the time Watt rushes, he does the same. That's a difference in their game, but it's not a detriment to Watt, Miller is simply a better pass rusher and it's the most valuable part of his game. It's a good comparison as these two may be the top candidates for Defensive player of the year.
Miller may be the better pass rusher but that's not what the award is given for (Though some might argue that point.). It's for the best defensive player for a given year. And, if you look at all areas (sacks, hurries, QB pressures, tipped passes or PDF, TFL's, total tackles, etc...), I think you'll find JJ is the best all around defensive player in the NFL this season hands down.