One Match, One ApplID - Two iTunes Libraries

I have more than one iTunes libraries.  One which is on my MacBook that I carry with me and one which is on my NAS.  My NAS is a huge library and often the backup of seldom played songs etc. the MacBook has more recent downloads and songs I carry with me on various iOS devices (Touch, Nano, iPhone, iPAD).
These two libraries are NOT distinct.  There are about 19,500 songs in all and 12,000 of those are in both libraries.
My question is, can I run Match on both (both have the same ApplID) and NOT have duplicates? Or will running Match across both libraries cause me to double up on my 12,000 tracks that are the same?
As it is now, I use the "Option-Click" to choose the library file based on location and music preferences.
Thanks,
Chris

When you initially setup your Apple TV it should have used one of your computers to sync with. You can set the other computer up to stream content to your Apple TV. You should be able to go under settings computers and setup your second computer to stream content.

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