Hiya,
I got a 2009 660 Tenere last summer. Fantastic bike, very pleased with it (exept for the size of the bloody thing, I`m only 5ft 8, check out my thread!!) If you go onto the Yamaha website www.yamaha-motor.eu you can compare models and both the 2013 and 2010 are listed. As far as I can see its just the clutch, rear suspension and ground clearance that they list as changed. Hope this gives you a few pointers.
John.