In La Liga, the only competitors are Barcelona and Real Madrid . Every year someone from Real Madrid and Barcelona is crowned champion but the English Premier League is much more varied than La Liga. It is difficult to say when any team will be the champion here. However, Barcelona is not less than Real Madrid at this stage. Now Barcelona is a full strength team. However, Barcelona defeated Real Madrid in the last match and proved that Real Madrid is the best so far.
Indeed the rivalry for the title in the La Liga has mostly been between Real Madrid and Barcelona and that makes it less fun and less intensed and competitive unlike in the English Premier league where you have up to 5 teams every competing every season for the trophy and that is why the league is so competitive and interesting and it is difficult to say who will win from the beginning.