Space Age vs Space Exploration

I tried SA when it was released but didn't play for finish because I understood that I spent too little time to space logistic... And now I'm playing K2SE and start to develop logistic between planets.

Actually I love SE logistic system because it's challenge where is I should develop own system from scratch. Instead SA where is spaceships has interfaces like trains, SE don't have any systems. I should think how to trigger space flight and how to prevent to filling landing pad storage.

And, instead SA, I can't start on the each planet from the start. For example planets with vulcanite ore doesn't have any water (except core fragments), and I should to transfer cargo rocket sections (or water) to the planet to send vulcanite from it. And I should think how many cargo rocket silos and landing pads, because each of them has is created for different goals and has own logic. In SA I don't need many rockets (I started from each three planets with no items and didn't visit Navius for a hours) but in SA I need. I should has the main base and transport a lot of resources from other planets from and to Navius.

It's very hard, but I understand the concept much better. SA seems too casual for me now) I don't know to expect later but I already love SE)