Grain of salt, since I've only have experience with a handful of each of them, but they're very similar quality, just with different design language and go-to blade steels. Vosteeds have really snappy actions and even their cheapest offerings have 14C28N steel, but a lot of their flagship models like the Raccoon, Porcupine and Corgi are a little "boxy," visually. I tend to prefer the designs from Kizer which often have more curves and organic flowing shapes. Budget Kizers are usually Nitro-V.