I have a Senate Lithium and it is an awesome ski. I can't comment on the difference between that and the Graphite as I haven't ski on one, however I did raise this same question in regard to a Vapor, when I was considering making the jump and @Horton reponse was, "I don't think anyone has every gone out and bought the Lithium and thought gosh I wish I had bought the Graphite". So if your happy to shell out the extra money the Lithium is definitely a nice ski. One other thing to note is I believe that Radar are going make the 2017 Senate range based on the new 2016 Vapor shape. Whereas the current 2016 Senate's are based on the '14-'15 Vapor. @eddie_roberts_jr might be able to confirm this and if the case would probably be worth the wait (if buying new).