the DX, LX, & EX are basically the same vehicle, they all have the same Engine/fuel-economy and performance. The only difference is that they have different comfort options, the DX is the lowest model with steel wheels (plastic hubcaps and no options), while the EX is the highest trim (with alloy wheels and many options.) The GX runs on natural gas, so it has a different economy and performance.....well all of this is true in the USA anyway.