I took the Sterling to rehearsal last night. It played like a champ! I liked the sound, but it's much more subdued than the SB-2.
So, what's the verdict?
I don't know! I have the bass here at work. I just checked it out. It's so pretty! The Sterling, that is. The orange of the body is beautiful. The bird's-eye maple neck is exquisite. My history with it is long and involved. Yet, if I keep it, it'll just sit most of the time.
If I trade it, undoubtedly the SB-2 would get playing time. But I'm having a hard time justifying 3 of the same basses. Plus, the sentimental value attached to the Sterling is keeping me from boxing it up and sending it across the country.