Message Router/Relay

I'm hoping someone out there can help me untangle my brain on Message Routers and Relays.

(Question 1 - are Routers and Relays the same think?  What's the difference?)

I have a case where I need to set up another update manager.  We would like all traffic for the endpoints assigned to that location to go through that Update manager and not directly to the server with the Enterprise console on it.

Getting the updates to pull from the new Update Manager is easy enough - I followed the instructions from the documentation on adding a new UM and all is well.  After I created a new Update policy to point to the new UM, updates were being pulled from the new UM.  Great!

But, it appears that the RMS traffic is heading right back to our main server.  After some reading, I figure I need to make that UM a Message Relay as well.  I use This KB article to edit the mrinit.conf, use ConfigCID.exe, etc. without errors or problems.  

BUT - one bit of confusion.  The doc isn't clear WHICH server you should edit and run ConfigCID on - The server with the Console or the new Update Manager server.  I figured I should run this on the master server with the Console, but I didn't see the new mrinit.conf file propogate down.

So, Which server do I update?

Also - if I make the change for a client to point to this new server for updates, will it also use it for Message Routing/relaying?  OR would I need to reprotect for that?

(Thanks in Advance)