Some of the changes you'll find on this leaked version of Android 4.2.2 for the Samsung Galaxy S III that come from the Samsung Galaxy S4 include revamped UI settings, new screen modes, voice controls that allow you to verbally control your phone, and a new version of S Voice. The other changes coming with the update include actionable notifications and new additions to the notification center, white backgrounds for the gallery modes, full screen Samsung apps, and Samsung Smart Switch which lets you move content from another smartphone to your Samsung Galaxy S III.
For instructions on how to install this leaked version of Android 4.2.2 onto your Samsung Galaxy S III, click on the sourcelink. Just remember that this is not an official Samsung release, so make sure you know exactly what you're doing before you start.
source: SamMobile via AndroidAuthority