Display Port vs HDMI KVM

I’m trying to choose between “1.4 Display Port KVM Switch - Single Monitor - Four Computer, 10 Gb (USB-C 2.0)” and “HDMI 2.1 KVM w/EDID & Serial Control - Single Monitor - Four Computer” but don’t really understand the differences.

Are there any big advantages to one model over the other?

Also, I’m looking to rackmount whichever one I get. I know the Displayport model supports this, but the site doesn’t say if the HDMI KVM supports rack mounting?

Thanks in advance