We only have one day to do Universal, so we are trying to figure out which park to go to out of the two, since we can't go to both with a one-day pass. Which would you go to? We live in the Chicago area, so we already are familiar with roller coasters and amusement parks because of Six Flags, and can just go to that here at home. Is IOA like that? If it is, I am thinking the other one. Thoughts?