Did they say anything about functional improvements? Longer cord, progressive trigger, a few ergonomic changes and...?
There is some changes such as remapping of the ECU, but the biggest difference is going to be in the trigger/cord/ergonomics.
When the ES tool first came out, the amount of torque was carefully chosen because RUPES created and innovated a new market. The number of technicians using a long-throw DA was near zero. Torque was selected to help maintain pad life in the brand new market.
As skill levels increased, we increased power, to give the users more options and flexibility.
With any long-throw DA, foam pads are highly stressed. The pad is sandwiched between a backing plate moving in very rapid circles and the again the paint which friction locks the pad to.... Increasing the energy through the pad decreases its life.
Going with even more power in the MKIII wouldn't serve much of a purpose other than to shorter the pad life more. Most technicians and users are getting great results on speed 2-4 as their skill level and familiarity with this style of tool increase.
RUPES has a great relationship with many of our customers and we listen to feedback. The Mark III is our response to their requests.
Both Mark II and Mark III are going to get you from A-to-B in about the same time, the biggest difference is Mark III will do it with better ergonomics and control.