I looked on pro football reference and they have a stat called adjusted value.
Bisho was rated 8 in '10 and 7 in '11. With out starting he had a 2 rating in '09.
Hawk was rated an 8 in '09 a 10 in '10 and 6 in '11. In 6 years he has averaged about an 8.
But at least that site seem to say that Hawk is a touch better than Bishop.
Personally I think that is a bunch of crap. I wouldn't use it to prove anything except that opinions vary.
The stats I want to see are, where does Bishop rank in passer rating allowed across the league? Where does Hawk. How many yards do they give up. How many tackles do they miss.
The MJS online said Hawk missed 15 tackles and Bishop only missed 10. However (and this is huge) Bishop allowed 10 plays of 20 or more yards and Hawk only allowed 5.5. Bishop had 0 batted passes and Hawk had 2.
http://www.jsonline.com/sports/packers/the-rodgers-file-c63ua6p-138019428.html You can't really compare blitz numbers because Hawk is the lead on the cross dog blitz and his job is to free up Bishop. Which he was pretty effective at. He still managed 15 QB disruptions to Bishops 20.
On this site Raashan Saalami posted the passer rating of all the defenders through 12 games. Both Bishop and Hawk were injured for the next couple game so the total number should be fairly close. Bishop surrendered about a 123 passer rating and Hawk surrendered about an 85.
See, we can find the numbers. Lets add them up and figure this out. I want to see some head to head comparisons of full seasons. Not just that Bishop had a +7 in one game last year. I have no idea what that means or how good it is. He could have had a -15 in the Chargers game. He could have finished year with a plus 1.
Without real concrete numbers, all I see is looks, seems, appears, bigger impact etc. What that tells me is, you like Bishop more so your eye test is not accurate.
I want to go out like my Grandpa did. Peacefully in his sleep.
Not screaming in terror like his passengers.