http://forum.xda-developers.com/show...postcount=2631
Cambios en sjb 8
Full Android 4.4 Kitkat themed UI
{including framework, systemUI(status bar), icons and few apps}
Kitkat launcher replacing apex
Memory footprint reduced of all apps
Upto 50 % more free ram(on system apps only)
Overall upto 30 mb more available ram when compared to previous versions
Faster app load time
Smoother scrolling
More battery friendly (like v7)
Kitkat camera app (No green preview and fully bugfree)
Fake 720p video mode (16:9) (actually 864x480) Videos look a lot better and ram not sacrificed
Camera image quality tweaks
Quickpic gallery app replacing google gallery
More languages added to keyboard, should not FC anymore
MX player removed
Better looking dark dialer
Digital clock removed
Analog Clock widget back to old 4.2.2 style
Android 4.4 Kitkat wallpapers
Android 4.4 Kitkat fonts
Android 4.4 Kitkat UI sounds
Android 4.4 Kitkat Bootanimation
All apps updated
New SJB Gapps updated (Contains latest play store and google now)
Also Xperia Pro is supported from version 8 onwards