Which rsync version is current?

[Bill Stewart]

When I run rsync --version, I see this:

rsync  version 3.2.0dev  protocol version 31

However the Cygwin Setup program says that my rsync is current and is
listed as this version:

3.1.3+20200429+gitf7746d0-1

rsync.samba.org says the current version is 3.1.3.

So...what's actually the latest? What's the difference between these?

Thanks

Bill