Galaxy S2

The main idea behind SuperNexus is to provide Vanilla Android experience, just like on Google's Nexus devices, to non-nexus devices. SuperNexus is entirely built from Google's AOSP Source. A lot of improvements and optimizations have been done to the Google's Source Code to have the best possible Vanilla Android Experience. SuperNexus is very light too as there are no 3rd party apps (ZERO Bloatware).

CyanogenMod is a free, community built, aftermarket firmware distribution of Android 4.0 (ICS), which is designed to increase performance and reliability over stock Android for your device.

after releasing ics months ago almost all the galaxy sII owners were wishing to experience the googles latest job on their beloved phone so developers , cookers and ... started to make this wish real and also to show how much they are able.

so this was the main idea for me as well, feeling ics the way google does and also improving whole things to have all things together.