How did medieval peasants differ from Roman slaves?

Roman slaves were powerless, they could be sold as a commodity. Also, Roman slaves did not have their own property. Most often, such slaves were involved in the most difficult and difficult jobs: they built fortresses, roads, bridges, etc. In the Middle Ages, peasants were economically dependent on the feudal lord, as they worked on his land. They could have their own property. They were not a commodity. They could easily change their occupation.