Okay, So the disclaimer says that you must turn off cloud saving for the GOTY Edition and that installing game will pretty much erase all progress. To be clear, since I have the regular game does that mean that It wont erase anything or does it not matter? Anyone with the base game have their saves erased?

london will overwrite your local saves no matter your version. if you leave cloud sync on these local saves will overwrite them in the cloud as well