I'm pretty sure they are different. There was a thread where this very issue was discussed, and someone with far more expertise than I was of the ipinion that only the navi screen is capable of displaying video. Even though I don't have navi, people always assume that's what the screen is for. The first thing everyone says when they ride in my 'X is "cool, you have navi", followed by me saying "nope, it's just a trip computer, navi is a $2k option" 