I have not used any WSP best badger, but I have owned three WSP brushes, and they're all quality items.

Specifically, I have the WSP Stubby in "Superfine." It's a marvelous brush and feels wonderful.

The Best should have less scritch than your Pure, and a bit more backbone at the same time.

Other nice brushes on Amazon might be something like:

• Frank Shaving finest (My daughter has one, it's a good brush.)
• H.I.S. Synthetic (Haven't used it, but I read lots of good reviews.)
• WSP Monarch Superfine or Silvertip