I am going to disagree with the above posters here. Looking at the matchups, DET is the 7th worst defense vs fantasy RBs. GB is the 3rd best, . . . that's a 22 position swing as far as matchup rankings are concerned. To give you an idea, DET is giving up almost 10 points/game more to fantasy RBs than GB.
Tampa is fighting for a playoff spot in a very tough division. BGE may get a TD, but so might Branch, Welker, Woodhead, Hernandez, Gronkowski, etc.
BGE doesn't get a lot of yards consistently. And given the matchup discrepancy I think you have to go with Blount, who certainly constitutes a larger portion of TBs offense than BGE does of NE's.