Unfortunately, I cannot compare these two models, but I can say that Brio is really good. It depends how dark is your room, but in every case (lightly darkened room, some diffused light) I am more than happy with Brio. I think these two are aimed at different audience - Brio seems to me as more all-rounder, focused on work, conferences, Win Hello, etc, where the Streamcam would look to me like aimed at streamers - that is reflected in the software as well.
When I looked at a couple of reviews on youtube, I honestly cannot say that there is a LOT of difference. Yeah, not very helpful, I know.