It might not matter if the Green Bay Packers have the better offense and defense overall if Fitzgerald takes over the game. That also makes the likely matchup of CB Charles Woodson vs. Fitzgerald one of the marquee matchups of the playoffs. Based on what I've seen over the past 16 Packer games, I'll take Woodson in that matchup.
Actually Boldin did play earlier in the playoffs. And as good as Fitzgerald was, he might have not gotten past the Falcons if it weren't for Boldin. From the NFL.com Falcons at Cardinals game log from last year's first round playoff game:
(9:10) (Shotgun) 13-K.Warner pass short left to 81-A.Boldin for 71 yards, TOUCHDOWN.
That long 2nd quarter TD put the Cardinals up 14-3. The final score was 30-24, so Boldin's TD was the difference in the game. Here's how Warner did in the four playoff games on completions to receivers other than Fitzgerald or Boldin:
The Cardinals need big games from Fitzgerald and/or Boldin to defeat the Packers.