neither of them are really even sport bikes i have owned both of them the 500r was junk the gs500f was reliable but was slower than death if youre gonna get a sport bike thats good for a beginner actually get a sport bike the ninja er6n and the 650 r are great for beginners verry forgiving but enough power for a seasoned rider youre gonna grow out of the gs500f in a month with the er6n its almost the same price as the 500r but you get a 650 and youll love it for years to come.