So the MotorTrend emissions analytic team found the Bolt to be more efficient in Drive mode "L".
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The Bolt scores 118 mpg-e combined on the Real MPG cycle in Drive mode (1 mpg shy of the EPA figure) and 121 mpg-e in Low. Emissions Analytics estimates the Bolt’s range to be 210 miles in Drive and 222 miles in Low; the former converts to 238 miles on the more liberal EPA cycle and the latter 246 miles. The Model S scores 101 mpg-e combined on the Real MPG cycle (2 better than the EPA figure), good for 200 miles of range.
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2017 Chevrolet Bolt EV vs. 2016 Tesla Model S 60 Comparison