What was the similarity of the historical path of the states of Western Europe in the period of the developed Middle Ages?

We are talking about the period from the end of the 5th to the end of the 15th century. The similarities are:

States were created on the territory of the Western Roman Empire, with the exception of Ireland, but of them it turned out to be the weakest.
They were all Catholic.
Until 800, there were only kings, then the emperor Charlemagne appeared, and from 962 the Holy Roman Empire was created.
They experienced raids by the Vikings (from the middle of the 8th century) and Arabs (except England and northern France).
They all took part in the crusades.
They had universities early (from the XII-XIII centuries) and parliaments (England and France, from 1215 and 1300).
Developed feudalism, many castles were built.
They suffered from similar troubles: plague epidemics, heresies, popular uprisings.