>>410034498
I tried them both a little with no prior experience. I preferred Unreal slightly due to the layout of the editor and useful features like blueprints/visual scripting being built in by default. Not sure if Unity implemented it's own blueprints now but you needed addons for them before.
For VR tutorials I found that the UE4 ones were less outdated and broken than Unity, where there are so many you may need to dig past old or abandoned tutorials and examples to find what you're looking for.