Larry Jordan explains the difference between Thunderbolt and USB 3 and gives his recommendation on which one to invest in. He writes, "Thunderbolt and USB 3 are both protocols for transferring data from one place to another. The easiest way to imagine that these are 'pipes' that carry water. USB 3 is a big pipe. Thunderbolt is an even bigger pipe. The bigger the pipe, the more data it can transfer at one time."
Read his full post here.