  The statistics of eigenfunction amplitudes are studied in mesoscopic
disordered electron systems of finite size. The exact eigenspectrum and
eigenstates are obtained by solving numerically Anderson Hamiltonian on a
three-dimensional lattice for different strengths of disorder introduced either
in the potential on-site energy (``diagonal'') or in the hopping integral
(``off-diagonal''). The samples are characterized by the exact zero-temperature
conductance computed using real-space Green function technique and related
Landauer-type formula. The comparison of eigenstate statistics in two models of
disorder shows sample-specific details which are not fully taken into account
by the conductance, shape of the sample and dimensionality. The wave function
amplitude distributions for the states belonging to different transport regimes
within the same model are contrasted with each other as well as with universal
predictions of random matrix theory valid in the infinite conductance limit.
