is a specific kind of: salt.

is a broader term that covers: barium sulfate, barium sulphate, blanc fixe | copper sulfate, copper sulphate, cupric sulfate, cupric sulphate | magnesium sulfate | SLS, sodium lauryl sulfate, sodium lauryl sulphate | sodium sulfate, sodium sulphate | white vitriol, zinc sulfate, zinc sulphate, zinc vitriol.