Originally Posted by
Stucky
Our bodies are not machines, and couple that to the fact that they are controlled by something which is not a computer, means that we can be unpredictable, and things aren't always what they seem
^This I believe is the answer. IMO it's not possible to have such a large difference in mph with such minor differences in the bikes involved, no matter how the figures are tossed around and calculations are made. I've had large differences in mph myself on the same bike many times, and I always chalk it up to differences in how I feel that day.