Is there a performance difference between a deck link external output and using an hdmi output from a high end video card? Better video quality or performance?

hi,
i use a decklink output card maily to have an extra output option. per example to couple a set of vmix machines, one or more for mixing and one for streaming. sometimes i use 2 or more mixing machines on the same location and connect them to one streaming machine.

using a bm decklink usb or mini works fine. i did not notice any latency issues, improvements or anything other than the normal latency as a result of recording. throughput on a decklink usb has no latency. so sometimes this output can be used on a screen or something. a decklink mini has no throughput. i can see and hear that by comparing the screen and audio outputs of the machines and compare this to the live audiofeed comming in.

thats all i can say about it, i'm afraid.