Lionel Messi will win another Ballon D'or, because he will win another national league title, , Copa del Rey, Champions League Spanish Super Cup, UEFA Super Cup and Intercontinental Cup. He plays in his national team better than Cristiano Ronaldo. Cristiano Ronaldo won this title in 2008 when Manchester United won the Champions League. National league title is not enough for this title.
I am sorry but in my opinion it is obviously Messi, Ronaldo doesn't even come close in the rankings. Heck I think most members of the Barca sqaud are better players. Have a look at this article, it explains exactly why: http://www.tocachat.com/a-detailed-look-at-why-messi-is-better-than-ronald-2436.htm