getting the list of modified/added/deleted files in two different tags using SVN

I tried creating a sample repository and created two tags using the below link. http://artis.imag.fr/~Xavier.Decoret/resources/svn/index.html. I created two tags namely R开发者_Python百科1 and R2.

When I use a diff command like diff ../tags/before-qt/ ../tags/after-qt/ it shows the files which got changed.

But when I try using SVN diff svn diff -r file:///root/project/tags/before-qt/ file:///root/project/tags/after-qt/ It throws an error

My question: 1) whats the difference between diff and SVN diff commands

2) how can I get the list of modified files in a readable format(tried using summarize also. But its not working)

3) can diff be used on binary files. Will they be listed.