I prefer the SB-1 to the SB-2. The SB-2 inherently has a pretty aggressive sound; it seems to go from bright and aggressive to brighter and more aggressive.
The SB-1 seems more nuanced to me; it can do the aggressive thing, but it can do the more classic P-bass sound.
Between that hot, wide-range MFD pickup and the very reactive volume and tone controls, it's capable of a much wider range of sounds/colors than one normally associates with a single-pickup passive bass. Spinning the controls and hearing them interact almost makes it feel like an active bass or a two-pickup bass.
The SB-1 seems more nuanced to me; it can do the aggressive thing, but it can do the more classic P-bass sound.
Between that hot, wide-range MFD pickup and the very reactive volume and tone controls, it's capable of a much wider range of sounds/colors than one normally associates with a single-pickup passive bass. Spinning the controls and hearing them interact almost makes it feel like an active bass or a two-pickup bass.