Originally Posted by Edgewaters
One of the major differences, besides the one being economic and the other military, is the concept of fidelity, central to feudalism, but not a part of manorialism. Vassals were sworn servants who owed their lord something similar to fiduciary duty. They were tied to their liege alone.
True, but it's important to note that vassals could be tied to several different liege lords at once. This created an interesting situation when conflict arose between lords, because their vassals would in some cases have the option to decide which side it would be more profitable to support.