What is the difference between the 2 versions of the HDMI 2.1 dual kvms?

There's 2 versions of the HDMI 2.1 dual kvm

HKS202-M24-USBK

And 

HKS202-M24-V2-USBK

Could you tell me the main differences between them? I might consider an upgrade if the difference is significant enough.