Alright, I've been noticing this recently that most people prefer one over the other, and that by a considerate margin, so I thought: what better avenue than a poll to determine which song the fanbase favours?
Personally, I'm going with ACOS - easy choice. Another World is probably my favourite DT section, whereas Octavarium starts out decent and then just descends into mediocrity during Full Circle, reaches a pretty good climax with Intervals, only to have it dragged out with the absolute bore that is Razor's Edge, which I consider to be the most overrated Dream Theater section ever.
Which song do you prefer and why?