I think the difference is in mentallity. The English believe in developing strength, and making an athlete into a baller ie if your'e quick, tall etc, then they can make you into a footballer. On the continent technique and skill is first and formost, then tactical awareness after. physical attributes are not pondrerd on till later development. Also while the emphasis in the English youth systems is winning, the emphasis on the continent is improving players, so in the long run the continental teams will always be ahead. Of course there are alot more to it but this I think is a major factor.