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SVN-based command-line interface is identical for both repositories. The only difference is that the key "-u" should be added to the addpkg and psvn newpkg commands for users' repository.
For example,

addpkg <package-name> -unewpkg <package

psvn -u newpkg <my-new-package-name> -u

which are explained in Typical development tasks.

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Up to a minor difference in two commands

all other svn commands can be used with users' software repository.
Here is a list of useful references to the documents explaining how it works:
Typical development tasks
Software Repository