The PRO 60 is our 6.5 inch HLCD Proaxial (horn loaded compression driver) It has a compression driver piggy backed to the back of the mid bass driver.
The XST-650 is a 6.5 inch marine component style coaxial. With a 1 inch titanium tweeter grille mounted.
Both share the same housing so size is the same. Output is the difference. PRO 60 is going to be when you are looking for a speaker that can reach wakeboard length. XST-650 is going to be for wakesurf or in and around the boat.
mainly in and around the boat, but reaching the rider would be a welcome plus, I basically have only 2 speakers in the boat right now (polk db-651) and want to add some tower speakers and amp and possibly switch out the polks for better speakers.