To be clear, the Mistura is a boar/badger mixed knot.Sorry to dredge this up. What’s the difference between the C3 and C5 Mistura’s? I’m guessing knot size? Handle size?
Which would have a firmer backbone? Would one splay a bit easier? I’m coming from a brush that splays really easily, and would like something a bit firmer but not a ton or they requires too much wrist effort.
You will not have an issue with lack of backbone.
For reference, I own the C3 Torga, each of the SOCs, and a Spanish Limited - all in Mistura.
Personally speaking, it's a perfect knot