X6 had the Gate Laboratory stages. X7 had Red's Palace, and I didn't make it far enough into X8 to comment about that.
I absolutely loved this track when I heard the first WIP from Dom. As quoted in the writeup, it is one of my favorite Mega Man X sources, and to see it done with such justice is incredible. As amusing it is to some, loved the orchestral hits. The piano was a nice touch too. Just a solid Japanese-like arrangement in general.
Also this song was made at the ripe age of 17!