  We investigate the phenomenology of Composite 2-Higgs Doublet Models (C2HDMs)
of various Yukawa types based on the global symmetry breaking $SO(6)\to
SO(4)\times SO(2)$. The kinetic term and the Yukawa Lagrangian are constructed
in terms of the pseudo Nambu-Goldstone Boson (pNGB) matrix and a 6-plet of
fermions under $SO(6)$. The scalar potential is assumed to be the same as that
of the Elementary 2-Higgs Doublet Model (E2HDM) with a softly-broken discrete
$Z_2$ symmetry. We then discuss the phenomenological differences between the
E2HDM and C2HDM by focusing on the deviations from Standard Model (SM)
couplings of the discovered Higgs state ($h$) as well as on the production
cross sections and Branching Ratios (BRs) at the Large Hadron Collider (LHC) of
extra Higgs bosons. We find that, even if the same deviation in the $hVV$
($V=W,Z$) coupling is assumed in both scenarios, there appear significant
differences between E2HDM and C2HDM from the structure of the Yukawa couplings,
so that production and decay features of extra Higgs bosons can be used to
distinguish between the two scenarios.
