The new version has more features and benefits: 

Redesigned User Interface. Various skins are available.

Full UNICODE Support.

Enhanced Reporting (summary report, errors logging, plus other reporting enhancements, including average bandwidth consumption and total copied/deleted/added bytes logging). New Status/Execution Summary windows are displayed after the job is completed. Preview window is also available.

Access open and locked files and databases, including Outlook, Quicken, etc. (Windows XP/2003 only).

New VVLauncher can be run as a Windows service, without users logged in.

New subfolder filters in the comparison window.

Improved encryption (with 256 bit support).