I have multiple DAWs on my computer, Pro Tools, Cubase, Logic, Studio One. I don’t notice any less performance in Cubase. I actually notice a little less performance in Pro Tools on some sessions with lots of virtual instruments. In saying that, it’s a pretty fast computer.
I noticed in your videos that the cpu bar was maxed out in Logic, higher in Studio One than in Cubase. It might be a muti-threading issue. Do you have hypertheading enabled? I remember that was an issue on really old CPUs with Cubase but I’m not sure if it’s still a problem in the newer versions of Cubase. Also, the UR824 interface you have has extra functionality in Cubase. That is a variable. You can delete a file to break the functionality in Cubase for the UR824. I forget which file it is but you might be able to search online to find it.