What's the difference between these two? Are they different systems or just different names for the same system? It seems the differences, if any, are subtle. One (manorialism) is rural/agrarian, while the other may include that but can also be more urban/industrial.
One fits within the other. The Manorial system was a method of organizing agricultural and some craft production. Feudalism describes the legal obligation of Lord to Vassal and vice versa. Manorialism is economic, feudalism is legal is a simple way of putting it. Also the manor system works outside of feudalism. the Russians kept serfdom until the 1860's and the manor system survived until the at least 1917 although I would argue that collective farming is another form of manorialism.
What's the difference between these two? Are they different systems or just different names for the same system? It seems the differences, if any, are subtle. One (manorialism) is rural/agrarian, while the other may include that but can also be more urban/industrial.
I'll second what Scout said. Manorialism seems to be the method of production at the individual level involving an agrarian lord/peasant relationship, whereas feudalism deals with the relationships between lord and vassal which would have legal, political, and cultural ramifications at the highest of levels.