Case had said they released a series three version at conexpo and was wondering what they changed and/or didn't change. To me they run pretty good as it is.
I am pretty sure that it is mostly just emmisions compliant parts that they changed. I could be wrong though.
Engine changes, cab controls change, ie. electronic twist throttle, SAHR parking brake in the transmission, Carraro Powershift option, outboard brakes in the rear axle, Variable volume option on the SM+ machines. See one of my other threads on Case M series for more info or ask.