[HiTech RedNeck]

According to the nutrition information on the salted butter I have in my fridge (a discount grocery brand) there is 90 mg. sodium per tablespoon. 1 cup of this would have 1440 mg. of sodium. Per the Morton Salt package, 1/4 teaspoon of salt has only 590 mg. of sodium. So the salted butter without added salt would produce a more salty flavor (assuming the entire sodium content of the butter to be in the form of sodium chloride).

[carlo3b]

The salt used in butter is a bit different than table salt, but essentially you are correct. Try it you may not notice it. We use unsalted butter in recipes to control the salt content in delicate recipes, and unsalted butter is made with a more controlled added process, and claims to be a wee bit purer.. I have my doubts about the later.