Paper simply doesn't matter as much. As long as you follow the same procedure and the developer temp stays the same you will tweak the exposure and contrast to get the image to look correct.
As long as you do things consistently between film runs it also doesn't matter if the film cools off the developer a bit. You would adjust your times to compensate. The key is consistency. I presoak in the Jobo but not in manual tanks because it brings the times between the two methods to almost the same.