Question is:
Is this group of WRs any better or worse than the ones that were on the last 2 SB teams?

I'd say not much different.
In the last game, we had only a few even on the roster at the end and Ward was completely lame (injured) in that game. It was Holmes or bust.
In the '05 game, Randle El threw a nice pass to Ward, but that was about it.

So we have plenty of fire power there assuming no big letdowns in performance.