For a Marketing/Business Ideas space, what topic would be best for me?

I am torn between these two issues.
The idea is to have a content membership space.

And compile the newsletters that I launch on Substack and Convertkit.

The membership Basho section is very cool with a FAQ section and such.

However, I feel like Flair is generally pretty good at managing my space.
Perhaps the latter would have more minimalist features to manage more things inside.

Could someone give me their opinion?