IMO, if you have a really decent mouthpiece, a lot of the differences between pro model and intermediate model start to vanish.
I am starting to notice that. I bought 8 'Vintage' MPCs (@$30) to sample, some good some not so good. I am liking the Brillharts. The facings on some of the other 'pieces are just not so great for a beginner like me, but might be nice later. The less usable pieces I am going to practice refacing on.
However, some clarinets do have a unique tone to them, but that is very subjective. Keywork is also very subjective. My big guitar/bass playing fingers like some space, but for some reason the horns with the tighter keywork(while more cumbersome) just feel good.
I disassembled the Noblet completely, and I am amazed at how nice the nickel is. There are very few scratches, and literally no wear through. The keys could use some polish, but that is easy enough to do. Again, no wear through on the nickel-silver plated keys. Should be gorgeous when done.