Enter and Numpad Enter are still distinct in QMK, and possibly some video game keybinds (just as numrow and numpad numbers can be recognized separately). Comparable to the left/right versions of ctrl, alt, super, and shift, I suppose. Fuctionally equivalent usually but can be differentiated, like a hypervisor using right alt to unfocus input.
I wonder if the labels on your linked keyboard really mean much. It could be like how Apple calls their backspace key delete, and has their own names for some of the modifiers.
Back in the last century, Mathematica was like this as well. On Macs, "return" wouldn't run the command you entered, you had to hit "enter" from the numpad. Shift-return may have worked as well, but it's been so long I couldn't say for sure.
https://en.m.wikipedia.org/wiki/Enter_key#/media/File%3AEnte...