Real Madrid started better than Barcelona. However Barcelona's performance was still good actually. They just struggled about finishing up their attacks with a goal. Maybe it was a really bad luck. But we would find out about it by next week games. Real Madrid might have lost points too by the way because they had to make a comeback from a 1-0 disadvantage.
That proves that how good result from the pre season can't be used as a valid data to know how performance from the club in the league when it has started. We may see the result from the next match. If barcelona will always get the same result from the previous match and it needs to do analyzation to the its strategy again. That proves real madrid's squad is far capable compared with barcelona in the various aspects.
Im thinking about real madrid was not playing serious at pre season match