Below are the highlight of difference between initial release and update1:
The CURRENT official deployment guide is inside the “Sitecore Commerce powered by Microsoft Dynamics and Sitecore Commerce powered by Commerce Server Sitecore Commerce Deployment Guide”. I recommend follow below order:
It is a bit confusing though as you may get different merge files (to merge needed settings into web.config of your Sitecore install) following the deployment steps:
Even you are not planning to use the RefSF, I highly recommend you still deploy its update package and uses its merge file. Most of the product tests were based on RefSF and assumes all the files/settings from it are present. Indeed, there are files/settings required by routing service are only included inside RefSF package. If you are using the merge file from RefSF, you don’t need to use the ones from SCpbCS and SCpbMD.
Besides, if you have other resources than catalog deployed under your Commerce Server site, the cache refresh step (after import catalog) might fail for authentication. You can delete the other resources, only catalog resource is being used by the OOB integration of SCpbMD , or manually refresh the cache after the error.
Ok, good luck and enjoy your deployment ;-)