Not just the engine you gotta look at mate you got alll the ice you was after etc looks like you got a good deal to me, i only test drove the 276bhp and the 313 i found the 313 much better but its not like you use the full power everyday, just wait till you get it, you wont stop a major plus to the 300bhp is that tunning parts are cheaper and there is much more bits for it, sometimes i regret getting a 313 due to this