As matter of fact, one of the possible ways for these models to have their own specific predictions might appear if nature would favor the local family symmetry case. This would then allow to completely exclude the global U ( 1 ) F family symmetry case and properly differentiate the non-Abelian S U ( 2 ) F and S U ( 3 ) F symmetry cases. All that is possible, of course, provided that the breaking scale M F of such a family symmetry is not as large as the GUT scale or Planck scale. Otherwise, all the flavor-changing processes caused by the exchanges of the horizontal gauge bosons will be, therefore, vanishingly suppressed.