L is inductance, the resistance to a change in current flow. It is affected by number of turns squared, and any permeable (iron-like) materials in the magnetic circuit. In this case, mostly the recoil permeability of the alnico magnets (how much they act like iron to a magnetic field)(ferrite magnets don't act like iron at all, they act like air). Q is the ratio of the inductive reactance to the pure DC resistance of the coil. A perfect inductor would have no resistance at all and an infinite Q. Q is also affected by losses in the magnetic circuit, which is mainly eddy current losses in the alnico magnets.
In this case, the CBs seem to be getting less L for equivalent resistance, which is turns basically. Maybe the coils aren't wound as tightly (that would raise R per turn) or their magnets have higher eddy current losses. Either way the differences aren't large. Mainly what I offer is different winds and some customization.