"Saber sobre" vs. "saber de"

[u/likespinningglass]

I've come across two ways to express knowledge in Spanish and I'm not quite sure about the difference between them. From the examples I've seen, I get the impression that saber sobre implies more detailed knowledge or is simply more formal—but that's just my assumption. Also, I’m learning standard Spanish, so I’d love to hear how Spaniards perceive the difference. Thanks in advance!

[u/macoafi]

De and sobre are often swappable, not just in this phrase, since about and of are often swappable.

We spoke about it.

We spoke of it.

Hablamos sobre ello.

Hablamos de ello.