You may not be able to discern any meaningful difference between the negatives, unless your approach to less automated procedures is quite random and inconsistent.
I added a relatively simple approach to rotary agitation to my black and white film development regime because it was a relatively simple and quick and conveniently easy to use way to ensure consistency, but I could have accomplished almost the same thing with a more manual approach, and doubt that it makes much if any difference to the results, either way.
The automation will help you avoid mistakes and may make things a bit quicker.
I added a relatively simple approach to rotary agitation to my black and white film development regime because it was a relatively simple and quick and conveniently easy to use way to ensure consistency, but I could have accomplished almost the same thing with a more manual approach, and doubt that it makes much if any difference to the results, either way.
The automation will help you avoid mistakes and may make things a bit quicker.