Technically, it depends on the type of driving. For instance, a taller tire would do better in constant speed conditions whereas a shorter tire would probably be better for stop and go. It's a matter of overcoming the torque of the actual tire. Taller requires more torque to accelerate, but once at a certain speed, it will have less RPMs per mile.
Two other factors probably contribute more than the slight height difference. One is the width of the tire. More rubber on the ground, the more drag. The other is related as the more air pressure (to a point) lessens the rolling resistance.

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87 300SDL - 215K Miles !!
99 F-350CC Dually PSD - 190K
86 300SDL - 189K
All on B-100