A regular cab only has one row of seats and limited interior storage, while an extended cab has two rows
of seats and also comes with small secondary doors. A crew cab has four full-size doors and is designed
to haul up to six occupants while also giving more room for interior storage.
A Mega Cab is exclusive to Ram 2500 and 3500 trucks and
increases the amount of interior space for passengers
and cargo compared to a crew cab but comes with only one bed length.