Author of Robust Python here: I definitely recommend Fluent Python as well once the 2nd edition is available. I wrote Robust Python to focus very much on how to write Python in a long-lived codebase and how to do trade-offs for readability/maintainability/testability/etc. It also covers a lot of things outside of standard built-ins (such as acceptance testing, mutation testing, pydantic, type checkers, etc.). I find Fluent Python to be more focused on more of the built-ins, and I think it might cover some of the performance trade-offs you might be looking for.

Long story short : I think both have a lot of value (but beware I'm quite biased on Robust Python)