How did medieval peasants differ from Roman slaves? why did they not treat their work in the same way?

Medieval peasants worked on the land of the feudal lord, but at the same time they could have their own property. They were essentially free. They were mainly engaged in agriculture.

Slaves in Rome were dependent, they had no rights, did not have their own property, and could also be sold on the market.

The peasants loved their work more, because they mainly worked for themselves, while the slaves were forced to work. Often, slaves died from exhaustion in hard work.