Same car, except for the suspension, tires adn starter method.

LX- Kingpin suspension, 4 black tires, pull start
MBX - Ball Pivot suspension, six colored tires (4 blue, 2 yellow), electric start.

All of the other parts are identical. If you go witht he MBX be careful when starting it during break in. I'd loosen the glowplug a little when starting it the first 4 - 6 tanks as the pinch as the piston reaches TDC will put extra wear on the gears and motor int he starter.