There's one new available for sale at $200-300 discount from 2012. Are there any differences between the 2011 and newer models?
Yeh the 2013 ones are different. They have CTD now (climb, trail, descend). The 2011/12 ones are R, RL,RLC. Plenty of info on here about both.
2012 had Kashima coated stanchions - I don't think 2011 had it yet
2011 Yeti 575 - Fox Float 36 RC2 160 - 31.4 lbs