Here's my convenient guide to identifying Buffets!
https://clarinetpages.info/smf/index.php?topic=1676.0My thoughts on models:
Evette is okay, but you could always do better. Evette ranged from good to bad, it all depends on the material and the model. In the bass clarinet world, you often see lower-grade Evette logos on decent Malerne products, so its sort of a crapshoot sometimes.
The B12 is decent, as is the B11. I don't really know what the differences are beyond the fact that B11 has black rings while B12 has silver. I believe both have been discontinued by now, but I could be wrong.
The R13 always, as far as I know, has an stamped (sunken-in) logo. It is often rather shallow and the gold wears off quickly, so its sometimes hard to tell without having it in-hand.
But, if you go by my guide, it should be pretty good at helping you get the feel of things.
The transfer logo that wears off in seconds is usually on the E11. Once it's worn off you're pretty much never going to see it again except in certain angles with strained eyes. (And ain't nobody got time to hand-paint the logo back on.)
Anyways, see if my guide helps. If it doesn't, please feel free to email me some pics. I can generally tell by keywork if its a Buffet product. Sorry about the images not uploading, we're hard at work fixing the problem.