Camhead engine in '10 was a big improvement in torque.
They did away with the fuel strip problems in '11 or halfway thru '10.
'09s may or may not have the Enduro Transmission, lower first gear. This may be a GSA only trans as well.
Buy one and ride it if it fits your budget.
Beware those with no sense of humor as they will cause you misery.
Disclaimer: I am only responsible for what I said, not what you understood or how you interpreted my words!!
'11 GSA supertanker/mothership, '11 Suzuki Burgman 400, '06 KTM 640A