  We explore the implications of LHC and cold dark matter searches for
supersymmetric particle mass spectra in two different grand unified models with
left-right symmetry, $SO(10)$ and $ SU(4)_c \times SU(2)_L \times SU(2)_R$
(4-2-2). We identify characteristic differences between the two scenarios,
which imply distinct correlations between experimental measurements and the
particular structure of the GUT group. The gauge structure of 4-2-2 enhances
significantly the allowed parameter space as compared to $SO(10)$, giving rise
to a variety of coannihilation scenarios compatible with the LHC data, LSP dark
matter and the ongoing muon g-2 experiment.
