Lucky you, Dawn - the E13 will definitely be on my list to try when I upgrade!! My understanding is the same as yours regarding the E11 being a wooden version of th B12 and I also understand that the French made instruments are more highly regarded than those made in Germany.
Fenix, going back to your original post regarding Yamahas, my original clarinet (as with many of us I think who started to learn around the eighties or earlier) was a Boosey and Hawkes Regent (yes, the one with the attractive high gloss finish!!) As a child I loved it but I had never played anything else (other than a very well used school clari for a few weeks at the beginning!!) When I started to play again, I bought a student model (plastic) Yamaha CL250, which is what I play now, though it has had an upgrade of mouthpiece and ligature! What I will say is that I found the key work very heavy when I first got it (and therefore very noisy). From what I remember of my Regent (as a rough comparison) the keywork was much lighter. My Yamaha was much better when it came back from its first service and the springs had been adjusted a little.
I have also heard criticism of the quality of the throat notes on Yamahas (at least at the bottom end of the range), though I haven't had a problem with this. I plucked up the courage to record myself playing at the weekend and really was pleasantly surprised by the quality of the tone - certainly didn't sound like an entry level instrument and my Regent definitely did (or perhaps that was just me at the time!)
If you can, take a clarinet playing friend along to listen when you try the instruments. I think it's actually very difficult to judge the quality of the tone when you are playing yourself and you may just want a second opinion!
Happy shopping!