Hi does anyone know if there is any difference between the hull on a 2004 sportster and a 2008 150 speedster?Is the change from Sportster to Speedster in name only or is there differences between the two?Would there be a noticeable difference in power between a 150 engine and and a 215 super charged engine?I am considering upgrading from my sportster but want to know if the extra money will be getting a newer version of what I have or is there more.Thanks