Version: 1.0
Repeatability: Click on any of the core world to see the 200 cost. Then click on the capital, and note the 100 cost.
File: https://drive.google.com/file/d/15V5srqt5HeFwnUJICMO0dGL6q74_6nGT/view?usp=sharing
For the entertainment project (which levels up all my entertainment districts). The cost on most of my core world is 200 construction. However, I've noticed on my capital that its only a 100 cost. Further, most other projects are only 100 in cost.