The massive difference with Barcelona is that they have at least five or six players who are the best in there position in the world, and can play world class football because of it.
It is the ability of those players that allows them to play stunning football. For my sins I support West Ham who have always attempted to play great passing football, the problem with that is we do not have the world class players to do it.
For me that has always been the issue with Wales, it is great to have this ethos of open attacking rugby if you have the ability to carry it off. Wales over the last twenty years have had the ethos but not the ability to win playing great rugby. That is what sets most teams apart from the AB's as they in general have the players to do it.