Difference between AX 2009 and 2012

Hi,

Our company wish to roll out AX from an ERP system that we are currently using (JD Edwards),  our Finance team are undecided as to whether roll out the 2009 or 2012 version.

I need to find out the pro's and con's of each version with regards to the following;

·         Architecture

·         Performance

·         Integration/customisation – which tool sets

·         Security/Configuration

Can you please advise how I can find out this information.

Thanks

Danny