  We use high resolution dissipationless N-body simulations to examine the
spatial distribution of galaxy clusters on large scales. The Standard CDM model
and two of its main competitors, Low density CDM and Mixed Dark Matter are
compared.The two-point correlation function of simulated clusters is compared
with an extended survey of APM clusters , and it is found that Standard CDM
exhibits a lack of power on all scales, whereas the two alternative scenarios
are able to match the spatial correlations well. Of the remaining two
models,the velocities in the MDM universe have a higher amplitude and their
distribution is much broader. We compare these peculiar velocities with
observations and find that both models have difficulty in reproducing the
observed numbers of very high peculiar velocity clusters. The reliable
detection of several more clusters with velocities in excess of 1000 km/s would
render the LCDM scenario in particular very unlikely.
