I'm thinking Taylor will likely do better, but there are some factors working against him. #1, his QB is out, but it didn't seem to hurt him last week. #2, he has more guys to share the rock with and #3, he doesn't seem to get TD carries.
Pittman is playing much better than most of us have seen and is at least an above-average back right now (the Falcons' D controlled that whole TB offense and Pittman seemed to run hard with what little room he had). Allstott is due to come back, but it will be interesting to see how Pitt's PT will be affected. He didn't seem to miss him too badly.
With 7 games left, I'm gonna predict another 760 yds for Taylor w/4 TDs and 20 catches for another 180 yds.
Pittman: 590 yds., 5 TDs, 35 catches, 300 yds, 1 TD.
Maybe about the same if you include the receptions.