In England,Rugby league and Rugby union are bar a few exceptions,regional games,League in the North,Union in the South.
Union often being called a rich boys sport, because it is played a lot by the Private (where the parents pay for their kids to be educated) schools boys.This is why youll see most of these games(if you google the venues) being played in the North of England.
Union pays their players a lot more money(a significant difference) so sometimes youll see the better League players making the switch in codes,who can blame them.
I dont care much for union... maybe cause Im from ,and am very much working class(blue collar)
If you ever get chance to watch our domestic rugby league(the superleague) Im sure youd enjoy it,very well produced and a great product for Tv.The season only just ended but worth bearing in mind.