I went to Max's BMW, in Troy, New York, and sat on both. For me the 650 was much easier to get on and off and felt better. I will ride both this Tuesday. I like being able to put both of my feet "flat down" on the ground. With side boxes and a top box loaded up with "stuff" and the extra weight I think this might be an advantage.
I was also told that the 650 is about 30 pounds lighter.
Again...thanks for your comments...I appreciate it!
P.S. one of the people who work for Max's rode the 650 and thought it would be a perfect bike to go to South America on. He has been there several times.