I understood the concept as pushing up to help lock the knee up and against the tank. Weighing the outside seems more of a controlled and directed action, whereas weighing the inside basically catches our body from falling so to speak. I know this as I've done both, and I can also add that weighing the inside has worn me out to the point of getting serious calf-muscle cramps toward mid-afternoon, while weighing the outside did not present such a challenge. While the question is does it matter which one is weighted, I would say no from the way the question was phrased, with the assumption that we are talking about how the bike would react. Another downside with weighing the inside peg I recall was the impedance of free leg/foot movement for proper posture and clearance.