hey there ,
i have an alnico v MM bridge in a custom made SG .
very even tonal response - not slightly scooped in the mids like the ceramic version .
it also loses that metallic edge in the bottom and the top - also not quite as hot .
i have recordings here of both MM versions (ceramic and alnico) in the bridge of the same guitar , and to my ears the alnico sounds a lot bigger and more organic .
but of course , it depends what sound you're after .
slate
:D