I don’t know how to compare with SU15
I went hunting a bit and found this for Niagara Falls: https://www.reddit.com/r/MicrosoftFlightSim/comments/1flopqw/flew_over_niagara_falls_today/
It looks like the height of the water is messed up now, and so “American Falls” is nonexistent, so instead there’s the bizarre extra “shelf” in line with the river, and I guess the wrong extra height now causes the main horseshoe falls effect to be floating above the surface. Here are two more pictures further upstream.
Anyway there’s a bug ticket for 2024, not sure if that will help us in 2020. Niagara Falls is a mess
