They are different shows but with a similar directional style. In many ways BCS is better than BB but BCS has the benefit of only having one season and still being fresh. The better comparison is to the first season of BB in which case I would say they are about even.

In any event, this is the most successful spinoff series I've seen in years. I had doubts that Saul and Mike could carry a show on their own but they certainly can.