Brady's safety or Welkers dropped ball. Which play was the bigger backbreaker?

Welkers taking some heat from the media (at least, the article I've read this morning) For missing a pass that would have given the Pats a new set of downs and a great scoring opportunity.

But not to be overlooked is the fact that if Brady would not have grounded in the end zone, the Pats would have been up 4 instead of 2 (maybe even more had they scored on the 1 play drive)

With a 4 point lead they could have sealed the game by doing what they had been doing all night...stopping the Giants in the red zone...

So which play do you think had the more devastating affect on the game overall? I say Bradys, because it affected the scoreboard.