According to the U.S. Government Printing Office, joint resolutions typically address limited issues while bills often cover broader topics. They are essentially the same, however, because each must be passed by both houses of Congress and signed by the president.
Concurrent resolutions also go through the Senate and House of Representatives, but a presidential signature is not needed. These resolutions typically address the rules used in both houses, or they express reactions to current events. A simple resolution involves either the House or the Senate and has no presidential involvement. This resolution covers the proceedings or responses of the legislative body that proposed it. Neither of these two types of resolutions becomes law.