  Current and upcoming cosmological observations allow us to probe structures
on smaller and smaller scales, entering highly nonlinear regimes. In order to
obtain theoretical predictions in these regimes, large cosmological simulations
have to be carried out. The promised high accuracy from observations make the
simulation task very demanding: the simulations have to be at least as accurate
as the observations. This requirement can only be fulfilled by carrying out an
extensive code validation program. The first step of such a program is the
comparison of different cosmology codes including gravitation interactions
only. In this paper we extend a recently carried out code comparison project to
include five more simulation codes. We restrict our analysis to a small
cosmological volume which allows us to investigate properties of halos. For the
matter power spectrum and the mass function, the previous results hold, with
the codes agreeing at the 10% level over wide dynamic ranges. We extend our
analysis to the comparison of halo profiles and investigate the halo count as a
function of local density. We introduce and discuss ParaView as a flexible
analysis tool for cosmological simulations, the use of which immensely
simplifies the code comparison task.
