Newb needs FLEX advice?

I am a first-year fantasy footballer trying to make a playoff run. I have a personal dilemma for week 12 flex (I need this win!). Mike Williams (TB) @ Bal. or Fred Jackson vs. Pit.? I know yahoo projections say go with Williams, and also Williams' matchup is "better," but Jackson is way hot right now and will def. get more touches. Jackson has been a touchdown machine for Buf. these past two weeks, and he's led them to their first two wins, so they'll def. try to get the ball to him. Anyway, I currently have Williams in because that's what yahoo and other rankings says I should do, but I still have a feeling Jacskon will pop once again, fantasy-wise. BTW, I'm in a 10-person non-ppr yahoo league with standard scoring. Thanks a lot, guys!