You will need to be careful going from R1 to R6. The R6 will actually corner much faster than the R1. If you ride with a group and you have a competitive mentality, your R6 will be hoover around the redline most of the time. You will tent to enter corner faster, later, carrying more corner speed and increasing speed sooner on the R6 compares to the R1. The R1 will be faster on wide open canyon. All said, it is you who need is the most important factor. How your ride, where you ride and your riding mentality will determine your joy of riding and keep on riding.
A seasoned riding friend asked me to talk down his nephew into getting the R6 instead of the R1. His nephew was riding pretty good. I told him what I am saying now. The R6 is more dangerous to him on canyon if he has the mentality to be the first at the designation point.