I think these are two quite different instruments and I may like both for different purposes.
Let me add that (regardless of price, which will skew in one direction or another on what is more affordable depending on when one lives) I would never place a B in my house, for the reasons mentioned below.
The B. is sparkling and light, very bright. It would suite perfectly pop music (which I really don't like) or playing main role (not simply accompaniment) against a classical orchestra or a modern band. I don't see it appropriate for any kind solo performance, particularly not in a house where it would be way too "punchy", both for the pianist and the (intentional or forced) listeners. I would add that some people would find it very good for baroque music, which was in fact written for the even more bright harpsichord, but I personally don't like that "middle ground" either: in fact if you want to go for brightness, just directly use a harpsichord (or better a clavichord in a house), otherwise simply embrace the piano sound with a warmer sound.
The S. is much more warm and intimate. Somebody would say it has the quintessential "fat american sound" which made S. famous -- but then many instruments carrying that brand are far from it, either because they are in poor shape, or because are voiced to be closer to the B. of this comparison for the reasons mentioned below, so in general I don't like the S. brand, but I like this particular one. It'd be perfect for any non-pop solo playing and it'd be perfect for home use. In fact it is similar to my M&H (which has a bit more punch in the bass but overall is even warmer and more luscious). That said, it would not stand out well against any classical orchestra (even a small one) let alone a modern band, so for that use would be almost inadequate.
So my personal preference go to the S. but that is because I'm skewed toward solo-piano music played in the house! If you asked me about a concerto with full orchestra, or a jazz performance with several other instruments (particularly but not only if there is any brass), I'd have picked the B.
I can see many people preferring the B. just because all the professional venues buy instruments with that kind of sound (or closer to that than to the S.) since they need the pianos to be good against orchestras and bands -- and use those instruments even for solo piano concerts even though in my opinion they are not the right ones for solo. As such, listeners are very used to that sound and seek it for home use -- and then complain the instrument is too loud (it's not loudness per se, it's brightness). I've seen plenty of such instruments in my search for my purchase, and discussed the issue with at least two piano technicians who agreed. Then of course for pop music, which as the name implies is very popular, a brighter sound is just the preferred one, even when solo or when the voice is the only other instrument
