The MB and AS are the same as the LST1 as far as the arms/chassis. They don't have reverse or hi-low trans or ano'd shock bodies. They also have a different pipe, engine and two speed assembly.
The LST2 has a different engine/pipe yet again, but the 2speed hub and trans internals are the same as the LST1. The LST2 has ano'd diff cases, thicker/wider arms, larger c-hubs, no rear turnbuckles, larger outer cvd's and bearings, larger fuel tank, threaded ano'd shocks and heftier chassis rails.
I believe the MB also had a spin/pull start on the engine, which made it different from the AS.