I've never seen a gallon go for above 2.99(if that) at safeway and never seen one below 3.99(if you're lucky) at whole foods
I've found milk and eggs to be sometimes slightly cheaper at Safeway, but they're really bottom-of-the-barrel brands and not something I'd buy anyhow. The brand of non-organic eggs I buy is sold by both WF and Safeway, but WF is consistently <= than Safeway, and there's only one or two brands at Safeway that is cheaper.
But this is pocket change. For higher-priced things, like meats (ground beef, chicken), I find WF's prices to more than make up the difference. Generally, unless Grocery Outlet has a great deal, we just default to buying meat, eggs, dairy, and vegetables at WF when we can. Unfortunately, WF is less convenient for us than Safeway, so we do regularly shop (and pay more for it) at Safeway if we're pressed for time.
From one milk lover to another, what's your favorite and additionally best value brand for milk? I haven't recorded my preferences but seem to remember disliking Trader Joe's and being plenty surprised by a value brand or two.