the drums and bass for the spirit version fills in the gaps the regular version. I think this IS the orginal version, but ZUN being a troll, split song into song because be can. Damn it ZUN for being so trollish, yet having god-like compostions!
Oh god, just when I thought it couldn't get any better until it got remixed, you went and brought the 2 halves back together into such a crazy good union. This is gonna be a helluva great greeting for Touhou 13! I know I'm gonna be subconsciously trying to combine the 2 versions of all the themes together as I play through the game come this summer!