Version Control and diff tool for Substance graphs and/or painter projects

I'm trying to improve my teams workflow and getting our substance files into version control is turning out to be a high priority for us.  I see that perforce used to be supported, but is deprecated in favor of the python api to allow users to handle VCS how they like. (Solved: Re: Substance 3d Designer Version Control doesn't ... - Adobe Support Community - 12223774) 

We are most likely going to end up going with a pure git repo, git + lfs, or plastic scm. However, before we get so far as building against the python api, I thought I'd ask around if anyone has an existing solution (open source or otherwise).  I'm also curious if anyone knows of a diff tool that supports substance files.

Thanks in advance!