I upgraded from a 2006 Concours to a 2016 in December. There were changes to the Concours in 2010 and 2015. Here's the list of changes which Kawi made in 2015, cut and pasted from a Kawi document:
* Revised first gear ratio is shorter to take better advantage of the massive torque to make starting from a
standstill easier, more difficult to stall at ultra-low speeds and just easier to control in first-gear, low speed
situations.
* New exhaust heat guard offers increased protection for the rider’s leg/foot and is better integrated with the
muffler cover, while new 300-cell exhaust catalyzers reduce emissions.
* Revised fuel injection mapping matches transmission and catalyzer changes.
* New low-friction steering stem bearing seal makes steering lighter and smoother.
* Revised K-ACT ABS settings for the linked effect when the rear brake is applied helps eliminate the linked feel
on the front brake for more natural feeling during low-speed maneuvers. Bosch’s latest control unit is also
smaller and has more precise control.
* New smoked brake and clutch master cylinders enhance appearance.
* Adjustable vent added to windscreen that reduces the negative pressure effect in the rider cockpit for
smoother airflow and reduced helmet buffeting at higher speeds. The vent has two open positions and can be
fully closed to suit weather conditions.
* Revised seat is narrower at front with a flatter seat area so that riders can more easily reach to the ground
with their feet and provides more comfort. The rear area is longer and flatter so the passenger can more
easily adjust position, is less likely to slide forward and is more comfortable. Double stitched seams
enhance the appearance and a slip-resistant cover increases comfort.
* Accessory Touring Seat ramps up the comfort level with 10mm low-rebound urethane layer for increased
cushioning and improved long-distance comfort, an even longer and flatter passenger area, and an
exclusive cover material that resists heat gain in the sun.
* Passenger footpegs are now rubber padded for increased comfort.
None of these changes are huge, but the modified first gear and the improved seat & windshield were enough for me to justify spending extra $ and go newer. You won't be disappointed with either choice, you can get a less expensive 2012 and have more cash for farkles if that's what is best for you.