BCS has emerged from the shadow of maybe the greatest show ever to become its own phenomena. And it's had to do this, while staying in the established framework of Breaking Bad.
It's also introduced its own set of characters, and expanded on characters that we already know--or thought we did.
Telling it's story in flashbacks and flash-forwards (or flash-present day ... we're not sure how long "Gene" has been working at that Cinnabon). BCS is a much more complex show than BB.