Hi,
I am the maintainer of both packages. Musescore has moved to git from
svn upstream. The only reason I kept -svn package is -git package
doesn't include a offline document. Since the -git version doesn't
seem to use those .pdf document anyway, I think it is save to remove
-svn package now.
links:
https://aur.archlinux.org/packages/musescore-svn/https://aur.archlinux.org/packages/musescore-git/
Yichao Yu