that benchmark is moot imo. Even if you bought two exact similar MBPs they would have different battery life. so buying two MBPs with different specs (and different batteries) then testing their battery life is not the correct way to test what hardware gets more battery life. the only way to test the i5 vs i7 accurately would be to use the same battery in both computers. meaning opening up both and using only one battery so there is no variation in battery life due to the battery itself.
so don't go by that test, they don't know how to conduct experiments