Should I use the manufacture's print driver instead of secure AirPrint? I've noticed that macOS appears to default to using secure AirPrint as it's printer driver over the manufacture's printer driver. Any reason why I should choose one over the other?
Consider this.

In the near future, there will be a macOS update. Your printer manufacturer may or may not release a timely driver update that matches the updated OS. As a result, your system may become unstable, not be able to print or worse. 

My strong suggestion is that, unless there's some mission-critical functionality you need, it's always best to go with the built-in drivers. With it, there's a much higher probability that your system will remain stable through multiple OS updates.