R help - Feb 2009 - Difference MNP-package and rmnpGibbs from bayesm-package

Hi all,

For my research I have to use a Multinomial Probit model. I saw that
there are two packages, that include a method to estimate my
parameters. The first one is the MNP-package of Imai and van Dyk. The
second one is part of the bayesm-package of Rossi.
The results for both packages are not the same using the same data.
Does anybody know what the difference is between these two approaches?

Kind regards,

Tryntsje