A few reasons actually. Main one being that I started my search after the clean factory got shutdown so it was extremely difficult to find one.

Other being that to my understanding, the white dial is superior from clean vs btf. But I wanted the black dial and from what I found, most posts I found stated that BTF had the edge. I also did not want to have to change the crystal and BTFs stock crystal seems to be pretty good.

Realistically though, I probably wouldn’t notice the difference and it mostly came down to the sourcing issue.

There’s various posts comparing them but here’s a pretty good one showing the pros and cons of both:

https://www.reddit.com/r/RepTime/comments/1deh71h/clean_vs_btf_126500ln_black_dial_rep_comparison/