Will they be able to tell the difference?

[jabinme]

Now that I recall that they can't tell the difference at my sub prescbribers office this question seems a little silly but just in case..

If I'm prescribed a benzo (klonopin) and I was to take a different benzo (valuum) or any other benzo for that matter just for conversations sake, is the test taker going to be able to tell what type of benzos I've been taking? Or is it just going to show up as benzos in a urinalasys?(sp)

So basically, I'm allowed for my piss to be dirty for klonopin, but not valuum. Would they be able to tell if I was taking both?
I know for a fact that they can't tell the difference on my suboxone prescribers test which is a UA.
Are all UA's the same?