Quite a lot.

* Syntax - in svn different commands use different conventions on how to use revision

* In svn moving directories breaks "subdirectory as branch" abstraction. I.e. there are no actual branches. Only files and versions of them.

* "Svn up" can fail, leaving working copy in broken, unpredictable state. This breaks abstraction, revealing that svn is little but copying files around. Git forces you to save your work and only then merge. That doesn't fail even when it fails to merge cleanly.