Disagree on both counts. The 1920, in working condition, is an adequate carburetor. It can be made somewhat less minimally adequate with careful time and attention, but it is not amazing. The main reason why Chrysler used it was that it was inexpensive.
Is it better than a BBS? By design, no, it's inferior. Performance? No, not ineherently; either carburetor can run better or worse than the other depending on the condition of the particular carburetor at hand.
But go with y'self; I don't try to dictate what flavour of ice cream anyone else ought to prefer, either.