I had a similar discussion with Elisabeth aka Itswhitenoise couple of months ago when i wanted to pick up an SLS as DD. She had both the standard SLS and the SLS BS. She told me the BS it's a totally different animal compared to the standard model and she would not recommend it as DD due to the stiff suspension. My advice would be at least to drive one before taking a decision.
I would trade the Cali for an SLS BS tho...