  The dimension-free Harnack inequality and uniform heat kernel upper/lower
bounds are derived for a class of infinite-dimensional GEM processes, which was
introduced in \cite{FW} to simulate the two-parameter GEM distributions. In
particular, the associated Dirichlet form satisfies the super log-Sobolev
inequality which strengthens the log-Sobolev inequality derived in \cite{FW}.
To prove the main results, explicit Harnack inequality and super Poincar\'e
inequality are established for the one-dimensional Wright-Fisher diffusion
processes. The main tool of the study is the coupling by change of measures.
