Who is better, Lionel Messi or Christiano Ronaldo?
I like Christiano Ronaldo, but I think he got in trouble for tax fraud, right? 
Yes, he accepted his guilt. I think this incident tarnished his image a lot. However he is still a great soccer player as far as his skills are concerned.
Do you think the tax fraud case was due to his politics? 
I don't think it had anything to do with politics. It was his own decisions as to carry out a fraud. Anyways, what are your opinions about Lionel Messi?
I don't think he is as good as Christiano to be honest, what about you?
In my opinion, Lionel Messi is a better player than Christiano Ronaldo. At least that is what the stats say.
I like both players to be honest, it is hard to pick a favorite. Never been to Barcelona though. 
I have been to Barcelona. It is one of the most beautiful place in Spain. I recommend you to visit it at least once in your life.
Interesting, I hear it is nice this time of year. Is it? 
Yes, I agree with you. The best time to visit Barcelona is May to June month of any year since the climate is pleasant and there are lot of festivals and events that take place during this time to welcome summer.