  Prompted by the recent surprising results in QCD spectroscopy, we extend the
treatment of the constituent quark model showing that mass differences and
ratios have the same values when obtained from mesons and baryons. We obtain
several new successful relations involving hadrons containing two and three
strange quarks and hadrons containing heavy quarks and give a new prediction
regarding spin splitting between doubly charmed baryons. We provide numerical
evidence for an effective supersymmetry between mesons and baryons related by
replacing a light antiquark by a light diquark. We also obtain new relations
between quark magnetic moments and hadron masses. Limits of validity of this
approach and disagreements with experiment in properties of the Sigma and Xi
baryons are discussed as possible clues to a derivation from QCD.
