Answer:
Class system is typically more fluid than the slave system or the other types of stratification and the boundaries between classes are never clear-cut.
Classes depend mainly on economic differences between group of individuals, while slavery does not allow free movement of people.
Classes are not established by legal or religious provisions, membership is not based on inherited position as specified either legally or by custom in a class system.
Slavery system is static whereas the class system is dynamic.
Class system, there are no formal restrictions on inter-dining and inter-marriage between people from different classes as is found in the slavery system.