Most of those who have watched it so far have only watched the 8k and 6k versions of it. I have also watched the 8k version of the scene on the Quest 2 standalone and noticed a significant improvement in the surroundings. The environment looked much more realistic and sharper. However, as for the actress's body, it's almost the same as any other scene shot in 8k over there.
According to their instructions, they tried it on both Meta Quest 2 and Pro connected to a PC via Oculus Link, equipped with Nvidia 3090ti, 4090 GPU. IMO, if you want to subscribe to VRB for that specific scene only, I don't think it's worth it, especially with that casting. However, if you're interested in the rest of the content, it's totally up to you.