If the Packers can pull off the 3-4 then they're much better off than the Bears will be. Because, lets me honest, we've got more offensive talent than they do.
Take this into consideration.
Packers had the best WR corps last year, but only a decent o-line
Broncos had the best pass blocking o-line last year, and a solid WR corps
Aaron Rodgers threw 536 times.
Jay Cutler threw 616 times.
Rodgers completed 341 passes.
Cutler completed 384 passes.
Rodgers edges Cutler out on passing percentage barely with a 63.6% compared to a 62.3%.
They had basically the same YPA. 7.5 for Rodgers, 7.3 for Cutler.
Rodgers had more TDs (28), and less interceptions (13) than Cutler who had 25 TDs and 18 INTs.
Now Rodgers put up those stats while being sacked more than TWICE the amount of times as Cutler did. 38 times. Cutler was only sacked 11 times.
Rodgers had a passer rating of 93.8 while Cutler had a rating of 86.
This was on Rodgers first season as a starter. This is Cutler's third, and for the record his overall QB rating has gone down each year since 2006.
Considering that Cutler will now be playing with subpar recievers and with a lesser o-line than Denver had, he's not going to be doing so hot.
And the argument can't be made that the Bears have a better RB because Ryan Grant and Matt Forte had incredibly similar stats (outside of TDs.)
Grant with 312 carries got 1203 yards and 4 TDs, while Forte had 316 rushes for 1238 yards and 8 TDs, and if you put into considering the receiving TDs then yes Forte has an additional 4 TDs to his credit, but you have to consider - Forte was THE only weapon the Bears had all season. He accounted for I believe 1/3 of the Bears total offense.
The Packers had 5 WRs that were all very good in addition to Grant, so they really didn't have to have him run it. The Bears HAD to use Forte.
Either way, don't overrate the Bears. They've got a long way to go. And to be fair, so do the Packers.
I'm giving the NFC North to the Vikings at the moment. They've got the most complete team in the NFCN and if they can get even say Percy Harvin or Hakeem Nicks, or perhaps trade up to get Josh Freeman so they can fix their QB situation then they are a SCARY team. Packers have to prove their 3-4 can work well before I give them a shot at even the playoffs, but the Bears have a ton of areas to work on as well so really don't overstate them.