Following the topic, I want to buy one of these next week, but still not decided. My findings:
It seems it narrows down to the focal length. 13 mm can be tricky for portraits or indoor shooting because camera should be almost in front of person's face
Fuji might be superior in IQ but twice the price.
Viltrox can wobble in video. Gimble might be needed
But I am leaning toward Viltrox