We can't really use that data for comparison. It needs to be same route, traffic, speed and weather to really assess the differences between tires. I'd guess the efficiency differences between the OEM tire and others is about 5%. Yet on my commute, I can see a 50% difference in energy usage just due to speed, traffic and headwind.
Put another way, you could decrease your average speed relatively easily to make up for the difference in rolling resistance between tires. For example, you might drive 5 mph slower on the highway with high performance (less efficient) tires but you could get the same net energy usage over trip as the low rolling resistance Ecopia OEM tires at a higher speed.
Traffic factors in as well. A highway drive with moderate traffic can be more efficient due to the collective wind created by the vehicles and you'll see reduced aero drag even without drafting/tailgating. With no traffic, more energy is used.
I see the combined effects of traffic and speed all the time on my commute. Traveling the same speed and no winds my efficiency will vary from 5.4 to 6.4 mi/kWh. (Note these great numbers are due to the 1000' elevation change.) I attribute most of this variability to whether I'm close to other vehicles or not. If I bump up the speed by 5 mph, by efficiency decreases and will vary from 5.1 to 6.1 mi/kWh, a typical loss of 5% over the slower speed. If I bump up the speed by 10 mph, my efficiency varies from 4.6 to 5.6 mi/kWh. That's a loss of 13% over the original speed. (It's more than 10% because drag rises as function of velocity squared: Fd=1/2*rho*V^2*A*Cd)
So, in summary, drive 5 mph slower with your sticky tires and you'll use the same energy as OEM tires to get somewhere. Alternatively, you can drive safely behind someone in traffic (no need for close drafting) with your sticky tires and you'll also use the same energy as OEM tires with no traffic to get somewhere.
