Ultimately, which grocery store is cheaper? Trader Joe's or Safeway?

United States
February 11, 2007 6:35pm CST
OK, so this has been gnawing at me for a while. When it's all said and done, what's the least expensive grocery store? I have a Trader Joe's that I go to most frequently, but I sometimes wonder if the neighborhood Safeway is cheaper. (or, if you don't have Safeway, some other large chain grocer like Giant, Albertson's, Giant Eagle, etc.) I go to Trader Joe's usually for the fresh stuff, the dairy & eggs, dried goods, and the occasional frozen meal. Does anyone know for sure which one has the better deals?