In the Middle Ages, these two kingdoms were quite closely related, with each other and had close blood and dynastic ties.
There was a particular similarity during the decline of the feudal system, when power began to acquire not monarchs and kings, but representatives of estates.
The first major difference is the state system and its governance. France had a peerage where the estate representatives had great power.
But in England, the structure was under which Wales had a kind of vassal oath, but he had to be a part of England, but it retained its legal possibilities.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.