Topic: m32/16 AD vs multiface one

As in the subject line. I'm want to add 16 channels of good A/D to my dual multiface (multifaces? multifaci?) setup. I'm wanting 32 channels of analogue  in to my computer. How much difference will I notice using the two different converters? (multiface one and M16/32) I realise I'll need to shuffle the audio due to different conversion times and that the M16/32 will be better!!

Eventually I want to go to madi, so hence why I'm looking at the M16/32's.

Thanks,

Isaac P