Researched this a few years ago for wrenches, sockets and such...
Craftsman was once made by Stanley for about 50yrs then lost the contract in the 90's to Delmar, who owns many industrial brands like Matco and Channel Lock. Husky immediately picked up Stanley to make the brand. Kobalt was a Snap-on brand, but not the same tool by far. Now both Husky and Kobalt have been recontracted and are made over seas. Daily I mostly use Klein, that as far as I know is still state side and still good quality.
I have an assortment of all of the brands and just grab what's easiest. Unless you make a living and need the Snap-On, Matco, Mac durability all day long, grab what's on sale.