there are only a few orthodox countries, there are way more catholics.
isn't that a sign that God is more with Catholics
I would be inclined to agree with dzheremi. Catholicism came to dominate the Western world, and I think you could probably make a strong historical argument that imperial expansion, the fact that the Catholic Church made Latin its official language and was spoken everywhere in the Catholic Roman Empire, and then also the fact that there has always been an imbalance of political power between the Western and Eastern hemispheres to account for the difference in size. An apparent fault of the Orthodox Church has been a certain degree of ethnic parochialism as well, which may be a result of attacks from the West, attempts by the Roman church to force the pre-schism Eastern church to Latinize, the Crusades, and then also attacks from Muslims and the sacking of Constantinople. I don't think its absurd to suppose that because of discrimination and even violence from the Latin West and the Muslim East, the effect has been that the Eastern Church has become somewhat insular - a pretty understandable consequence of its history of relations with other groups (I don't want to indict the Church though - many good efforts to evangelize have taken place. It is, after all, the Church of Peter and Paul. My parish actually is a great mixture of Arabs, Greeks, Ethiopians, a convert from Islam, and other converts and everyone eats together and is in fellowship. We're so lucky to have such a welcoming parish that doesn't take much notice of ethnic boundaries!).
Also, the official statistics no doubt include in its ranks many who are not actually believing or practicing Catholics. As a convert coming from the RCC, I know first hand that there are so many
poorly-catechized "Catholics" these days who can barely even follow the liturgy, don't know the Creed by heart, don't believe that Christ is truly present in the Eucharist, and some times don't even know that Jesus is both fully man and fully God. I would hazard a guess that there are tens of thousands of these sorts who identify as Catholic, or those who have hardly ever been to Mass but come from a predominantly Catholic family and so think that that makes them Catholic. I think the data are skewed. Anyway, I certainly don't think that the fact that the Catholic Church has more adherents means it is more favoured by God. It's a consequence of history.