Unity 4.6 GUI vs NGUI Performances (mobile and pc)

I am curious if UnityGui in 4.6 is as fat as NGUI and is safe to use on mobile devices (ipad 3 and later for ios, nexus 7 and later for android and computers with 4gb ram and min 2.4ghz dual core).

I am curious if somebody can profile this, and see if I should design a GUI system in 4.6 or use NGUI with my intended target platforms.

This should be dicussed in the forums, but if you want to profile it check this documentation: