i dont know about the le but i do like the eco on my corola s. that to me is great gas milage and u tell people and they seem impresse. i love it.
Actually, we will probably never know an exact difference in MPG between Eco version and others as MPG has as much to do with driving style/conditions than the car itself.
I'm no "hyper-miler" but still a bit conservative driver and the economy of the Corolla, going with the flow of circulation, is great (would be even greater with both Valvematic for highway and hybrid for city !).
You can bet that there are Eco owners out there getting terrible MPG and LE/S getting stellar numbers. All we can say is that in similar tests (EPA), Eco does slightly better.
But tests conditions and real life are two different things and EPA ratings should be seen as nothing more than a general rank.
Medias don't help when they report about people suing and winning in court for "not getting marketed MPG economy numbers". There is always another fault underlying those situations.
Ford and Hyundai/Kia, for instance, were not respecting the test protocol and Honda had issue a recall to downgrade the electric motor power (via firmare) in Civic Hybrid because they used inappropriate batteries to sustain it (hum...).