The term smart beta is something I try not to use because it's been misused and overused as some kind of marketing device for many fund managers. What I believe you are referring to is more accurately referred to as factor investing, as in the Fama French three factor model or five factor model. Some people also call these styles like Morningstar. But sir, I am a scientist, not a philosopher. The best podcast source for learning about factor investing is the Rational Reminder podcast with Ben Felix.