There seems to be so much misunderstanding of battery performance. SOC depends on too many variables for the individual to totally control and it is unreasonable to expect the same performance day to day. The driver has the greatest inadvertent influence, such a variations in the rate at which...
My understanding is that with careful throttle control you emulate the lower RB settings but it means keeping your eye on the power meter, not such a good idea, but if you keep the power at the changeover point you are coasting.