Did serfs or vassals have more power in medieval Europe?

In medieval Europe, vassals generally held more power than serfs. Vassals were landholders who received land (fiefs) from lords in exchange for military service and loyalty, granting them a degree of political influence and autonomy. In contrast, serfs were laborers bound to the land they worked on, with limited rights and little power beyond their agricultural duties. Thus, the hierarchical structure favored vassals, who played crucial roles in the feudal system.