Given everything else equal (e.g. same overall amount of magnetic material, same strength magnetic material, same coil, same power supplied, etc. etc.) which of these two magnetic configurations of a voice coil actuator would produce higher amplitude sound from the speaker cone?

I assume 1 should be better than 2 (and even that 2 shouldnt really work at all), but my colleague is claiming no 2 works better!

P.S. The non-magnetic filler material is just a sliver to keep the two magnets stuck together

Given everything else equal (e.g. same overall amount of magnetic material, same strength magnetic material, same coil, same power supplied, etc. etc.) which of these two magnetic configurations of a voice coil actuator would produce higher amplitude sound from the speaker cone?

I assume 1 should be better than 2 (and even that 2 shouldnt really work at all), but my colleague is claiming no 2 works better!

P.S. The non-magnetic filler material is just a sliver to keep the two magnets stuck together

EDIT: Apparently there is an effect which has been described before - there's a question here about it. In this case I suppose my question becomes - why aren't voice coils made using 2 opposing magnets like this?