I just imported the Soul: Cave demo in UE5 to make a little comparison with UE4.
I enabled Lumen GI and Lumen reflection and tweaked a few things is some materials and post processing and rendered the following video using a 2080ti.
It took 12 minutes and 14 seconds for UE5 to finish and 4:52 for UE4 to finish which was using baked lightmaps and reflection captures.
As you can see, the depth of field and motion blur effects are also better in UE5.
You can download the Soul: Cave project from marketplace.