Sorry to bump this old thread but I made a little animated gif of an 07 Langster Boston (same as all 07 Langsters) and a Langster 'Comp'. If you want a better component setup, the 'Comp' is a good deal... plus you get a better compact geometry. The older 05 and 06 Langsters had a more compat geometry than the 07's but not the same as the 'Comp'. It looks like Specialized brought back the Langster 'PRO' from 04 as the improved 'Comp' with a couple minor geometry and component changes...