I think if you would've said you only used real flutes in your comment on my submission, I would believe you.
To my ears it seemed like there was a pretty consistent tone from one section to another. I heard a slight difference about 1:20 onward where the flute started to play longer notes with a little less tremolo or grace notes, but I figured that was done intentionally as part of the section changing. I may be completely wrong, but that was my initial thoughts. Honestly, I really had to listen hard to see if there truly was a difference if any, and that's coming from someone who's sat next to flute players in concert bands for several years.
As for the rest of the piece, I would say the vibe/atmosphere accurately captures what you set out to create. At the very least, it feels authentic. There's such a nice mesh of traditional Japanese-sounding instruments with a choir that gives it this holy, otherworldly sound. I imagined this piece as something that would be playing for somebody being guided to and joining this religious/ceremonial event.
I enjoyed this piece enough to listen to it multiple times, which I think gives away at least what I'm marking down for Listen-ability. Thanks for sharing this, and keep up the amazing work :)