Are drives with the same name differentiated?

I'm running OSX 10.6.8 and three external drives on which data is stored (a main drive, A-Data, and two backups). A friend may decide to help me with a project and to do so will have to have the same setup. Naming the drives on the second system is of some concern to me, so I did some research.
The fellow at http://www.cnet.com/au/news/drives-in-os-x-appearing-with-1-appended-to-their-na mes/ states:
If by chance you mount two drives of the same name, because the system can't create two mount points with the same name it appends sequential numbers to new mount points as they are created, and therefore you will see the numbered drive names in the Finder.
Unless I misunderstand what he is talking about, I found that I can have two drives with the same name. I can have two drives named A-Data on my desktop. And therein lies my problem (maybe). The project involves Premiere and several of it's sister programs, all of which require external files (video, audio, stills) to be linked, not stored within the working file.
QUES 1
Are disks with the same name distinguishable by OSX or software?
QUES 2
Assume that
I am working on a project which is saved on A-Data (and all the project links are to files on that particular A-Data)
I then connect another disk with the same name (and with the same folder structure), and backup my files to it.
I then eject the first A-Data and open the project on the second A-Data.
Will the software say that it can't find the linked files (because they are on the ejected disk), or will the project open as normal?

Avoid having the same names if at all possible, especially if you use apps that 'link' to the media via the file path.
The file path is set by the order in which the disks mount, which can change across reboots.
To see what is going on by using Disk Utility…
Select the first volume, look at the mount point (a blue link at the bottom of the Window) …
/Volumes/A-Data
Now connect the second volume & select it, look at the mount point…
/Volumes/A-Data 1
Now reboot, power off the first disk, leave the second one on & power disk one back on when the OS has competed booting. They will show the same paths, but each disk is now the 'other' disk - this makes a big mess for Apps like Premiere.
The only way to make this work is to clone every file to be identical on both disks, and never use Premiere (or any app that links to media) when both disks are connected. Otherwise you risk linking to media files on 'A-Data' and 'A-Data 1'.
Premiere must have tools for sharing projects - look at them before using disk names in this way.
You could however clone 'disk 1' to 'disk 2' & then rename it on the second Mac (to make them identical to fix the paths for Premiere), just avoid bringing them to one Mac with the same disk names. It does make more headaches in future though, because your friend will add new media that you need to migrate back to your disk.

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