I'd say the Vi-king shocks are a step or two above the Spax, they are true double adjustable and the valving can be customized. They are more expensive too. Can't help with the B stuff, it's just min-max length and bushing opening.
I'm not going to be wrenching for a few weeks, broke a finger @ work, first time in 32 years I got hurt that I couldn't work. Still I'm @ work, just doing some paperwork. Just puts a serious crimp in the Ricer Cuda work.