TCOT and IT are just about as close to each other as the results of this poll are. They're both phenomenal songs and almost their two best epics, but I gave IT the edge. I love the main riff in the first verse of TCOT, but I don't love the way that verse flows. It's perfect in the second verse, but it's eh in the first verse. The vocal melody in both verses leave something to be desired as well. As far as the lyrics, the only problem I have with them is the second prechorus and the way JLB/MP sing them in both pre choruses. Other than that, the song's perfect.
In IT, The instrumental section in Live, Die, Kill after the vocals is the only weak part of the song. It's still good, but compared to the rest of the song, it's nothing spectacular. And Surrender, Trust, and Passion feels like it wants to be Razor's Edge really badly, but doesn't quite hit the impact RE has. The rest of the song is outstanding and comparable to TCOT. They're both fairly even to me, but IT comes out slightly higher.