Logitech Brio 4K is £194.99 on Amazon so not really. And the Brio has sync issues with 4K. This capture card is cheap considering it turns your 4k mirrorless or DSLR into a 4K streaming camera with all the benefits of full lens and camera control. Your camera needs a clean HDMI out, most Sony's do Canon less so.
Can't comment on whether its a deal but you can get a lot of webcam for that price
Video review: Turn ANY Camera Into A Webcam - Elgato Cam Link Review & Setup Cam Link – Is Your Camera Compatible?