First of all these are hand made brushes, and each one will have some variance from the production process. Secondly badger hair is a natural fiber and there will be variance from one animal to the next and from one area of a badger to another on the same animal.
Basically there has IMO been noticeable variance in Simpson Best hair. Some is noticeably skritchy, while others might as well be silvertip in terms of softness at the tips. Most all have very good backbone, but density will very a bit. Its all normal, and especially if you think its still a quality brush should not be any cause for alarm.
"Loric=Ernest Shackleton of SBAD" - Krona Kruiser