Just curious on other people's thoughts on this. I have UE4 experience and VR experience but not Unity, but it seems 95% of startups I see are using Unity. For me it's bizarre because I will entertain arguments about why Unity is better for small VR teams and I will entertain arguments for why UE4 (and UE5 soon) are better for small VR teams, but I don't understand why it seems dominated / so one-sided among the jobs I'm searching. I would expect there to be some level of balance given that it seems like there's compelling reasons to use both.

And I know among AAA game studios Unreal Engine has a bigger marketshare.

Not here to argue about why Unity or Unreal is better because clearly there are pro's and con's to both, it often comes down to personal taste or to particular goals for a project and project requirements, and the best tool is often the one that a person is already most familiar with.