Subversion allows you to check out just a subtree of a repository; Git requires you to clone the entire repository (including history) and create a working copy that mirrors at least a subset of the items under version control.
Git’s repositories are much smaller than Subversions (for the Mozilla project, 30x smaller)
Git was designed to be fully distributed from the start, allowing each developer to have full local control
Git branches are simpler and less resource heavy than Subversion’s
Git branches carry their entire history
Git provides better auditing of branch and merge events
Git’s repo file formats are simple, so repair is easy and corruption is rare.
Backing up Subversion repositories centrally is potentially simpler – since you can choose to distributed folders within a repo in git
Git repository clones act as full repository backups
Subversion’s UI is more mature than Git’s
Walking through versions is simpler in Subversion because it uses sequential revision numbers (1,2,3,..); Git uses unpredictable SHA-1 hashes. Walking backwards in Git is easy using the “^” syntax, but there is no easy way to walk forward.