Pandora. While Galaxy's Edge is well done, I find it depressing and uninviting. I haven't ridden RoR yet, but I'm assuming it is very good, one of Disney's best. Still, I much prefer to spend time in Pandora. I love the lights and colors and sounds of Pandora, and the water features are amazing. Although it is a bit short, I enjoy NRJ, and FoP is one of my favorite WDW rides. I haven't ridden RoR, but a land, to me, is more than just its rides, and Pandora comes out on top.
Edited: for clarity. GE is not depressing, except how they cheapened out