Thanks for responding, Melita.
I should have been more clear that the Help Doc I was referring to is titled, "How Buffer Works" which does a good job of conceptually explaining Euclidean vs. Geodesic, but leaves a bit to decipher how you how to manage this within the Tool.
However, the Help Doc I believe that you are referring to titled, "Buffer (Analysis)" does do a good job in indicating how to manage this within the Tool. ...Sorry that I had not also read that. That said, maybe these two Help Docs need to tie into each other a little more fluidly.
I tried the buffer both ways and can see and understand the difference.
Thanks again, Craig