“You can run both."
They compliment each other, yet the final decision is yours. Especially when it comes to those functionalities where the 2 CLI tools overlap.
If you do opt for running them together, just use Composer template for Drupal projects.
we can use them together...
https://www.cmsdrupal.com/blog/drupal-console-vs-drush-should-you-run-both-or-stick-one-each-cli-tools-most-powerful-commands