Thanks sergiocornaga.
I can see why you'd find it bizarre. I actually don't use the same chord progression as the original. It was my intention to be Traz, while not being Traz.
I used AquesTone VSTi to sing along. It uses some japanese anime style of singing. I suck at songwriting (finding nice lyrics) so this was a great way to compesnate yet give the impression someone sings.
At the end of the song, it plays in the original chord progression. It gives a nice sense of going from a somewhat darker side to a more positive side, which fits the fact that the song is quite long. the same happens also during the smaller interludes.