Ok...I flashed XXLSR and used it for awhile, but tested it intensively...:P
In short: It is better than ICS!
New TouchWiz UX UI:
A sleek new launcher just like s3
JB statusbar and notification drawer
Lockscreen with shortcuts and wave animation
New dailer, browser, gallery and recent apps
New menu layout
New options in Settings
769MB of RAM..:/
Live wallpaper as lockscreen background
Impressive, isn't it?
So if the benchmarks scores are high in future custom ROMs based on XXLSR, most probably it is because of the kernel, cause the ROM itself is already good...
JB is running good, and I found that Sammy actually implemented a lot of codeworkx's improvements into their new kernel...hopefully the kernel sources will be out ASAP...but one thing I dislike...the new ROM is awfully large...means a lot of bloat is added...to the extend that the system partition is not enough until a symlink to the preload partition must be used...good job...good job...:/