Well ones that I have noticed are.
Changed paint on front bumper guard to gray from silver.
Spray in bed liner in bed from factory.
Guard around radio antenna bracket now.
Integrated hydro dump into brake pedal instead of knob on dash.
Availabilty of sliding windows in the doors.
Also thinking some minor tweaks under bed for engine and other brackets if I remember right.
Think they also redesigned part of the high air intake kit that goes between bed and cab for better airflow.
Next time at dealer will see if there is anything else. Got first one that they had come through and has been good with 250 hours except for a leak sometimes at the window seal at top of cab leaking. Do recomend the high air intake kit if you are doing much off road to save air filters and also the diesel water seperator filter kit as ad ons.
David Kb7uns