An Open Carrier is typically similar to
those which you see bringing cars to a dealership, and they
range in size and capacity. The cars are open to the weather
conditions and other road conditions.
Enclosed Carriers (which also vary in size
and capacity) prevent weather and other conditions from reaching
the automobile. Enclosed carriers, while not reserved for
custom and luxurious cars, are usually recommended for them.
Enclosed carriers are usually a significantly higher price.