They are approximately equal to me (I really love both, they're both stand out songs to me from two great albums). But, I chose "no, just no" since if I HAD to choose one over the other I'd go with Octavarium. I don't want to live without either, though.
I actually listened to both of these songs just today, what a coincidence. I even e-mailed a co-worker about TMOLS this morning (to bug him, he doesn't care for Systematic Chaos).