QUAD core intel Vs AMD 64 bit

My company is looking for a new computer/workstation tohandle solidworks and cosmos

I have been looking at both quad core and AMD

which i beleive that the quad is only 32 and can only run 32bitsolidworks
where as the AMD can run 64 bit solidworks

which will be faster/ better

money doesnt matter yet.SolidworksAdministration