Ronaldo scored more, assisted less.
Messi got rested in the league once it was won, preparing for the CL final.
Ronaldo scored 11 in those 4 games Messi missed, so there's no guarantee Messi would have scored enough to stay ahead either way.
I don't think Messi's too concerned either way, he knows and everyone else knows he brings a lot more then goals to that Barca team, he's basically a forward playmaker and striker rolled into one.
Last nights game was evidence of the different class between him and Ronaldo, imo.
Ronaldo's world class when every things going well, but his lack of team ethic and work rate means he's never going to stamp his authority on a game that Madrid are not already well onto of.
Messi on the other hand ...