General how can i tell

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http://androidforums.com – ok i know that AOSP=stock plain rom which guys built from nothing fancy about AOSP. then there is GB=ginger bread which seems to be the best and most stable then you have the MIUI to me seems to laggy. haven't wasted my time with it. ICS a tad stubborn can't add apps from other roms non ics my question is how do i know when the rom is AOSP or SENSE. if i'm not mistaken you can have a GB-sense rom.?? or just a all sense rom.?? thanks (General)