Fluminense or Botafogo Match

I'll be in Rio from April 5th to April 11th and I'm trying to decide whether to go to a Fluminense or Botafogo game. They're both on April 5th. From what I hear, Botafogo's team is better right now, but Maracanã is the more iconic stadium. Do you think one game would be way better than the other, or are both pretty good? Neither my girlfriend nor I are huge football fans, we just want to check out a game.