It may be a coincidence. Dan Wentz, the composer of the FS1 and FS2 soundtracks, used a synth library called "Symphony of Voices," which is a lot of choruses going "oooo" and "ahhh" with some consonants thrown in. There are probably snippets of hymns thrown in there too.
I think both FS:TGW and FS2 have the best damn music af any game I've ever played. I converted some of them to MP3 and listen to them at work. Good music for writing code to
FS:TGW was much moodier, IMHO; I think that fits with the darker storyline. Whenever I listen to FS1's "Brief1," I can still hear Admiral Shima telling me about the destruction of Vasuda Prime...