LXi - 1.5-liter non-VTEC, black side mirrors, black window surrounds, pillar antenna and 13" mags
VTi - 1.6-liter VTEC, colored side mirrors, chrome window surrounds, power antenna and 14" mags
As for consumption, they shouldn't be that far apart. Some even say that the VTi is more economical because of its better technology, but this is yet to be proven.
As for price, these should go at around 250-300K depending on mileage, body rigidity and added features. Be very meticulous about the suspension. Check for rattles or any blog-blog sound on potholes.