Played through this and Agrippa. I'm not sure I'm close enough to the intended audience for this to give decent feedback, but maybe you'll find my thoughts useful.
I don't have much to say about the aesthetics. Seemed too abstract for me to have an emotional reaction. Maybe if I had any sort of context going in I'd be able to be awed at the ruins of a lost civilization or walking through the innards of a dead god or whatever you're supposed to be doing, but as is it just seemed like a bunch of polygons with noise patterns on them.
Agrippa was the more interesting game mechanically with its first-person tank controls, but I don't really see the point of a lot of the experimentation. Tank controls make sense for a third-person game where the player doesn't control the camera, but for a first person game with mouse and keyboard or twin sticks, I don't see what problem it's solving. Having DOOM/Wolfenstein 3D-style controls in first person and a twin-stick shooter scheme when in third person would make more sense imo.
You've said in the threads you're not sure which of the projects to take forward. I'd say look at it from a practical perspective; open world RPGs imply a bigger world, bigger scope and more varied assets than a survival horror game, so it's probably easier to make a survival horror.
But honestly, I really don't see the dichotomy between the two projects. Synthesis would seem the more interesting path going forward rather than sticking with either one of them. I've seen plenty of open world RPGs and Survival Horror games, but I can't think of any games that combine the two.