Yeah, I have heard a few Copts talk about this distinction (not just the HG Bishop Youssef, but also a priest on CTV), but honestly it didn't really seem like they understood it 100%, or at least not like Byzantines do. It seems like a Byzantine thing that Copts picked up somewhere, and probably fairly recently. HG Bishop Youssef is my bishop, I have met him and I respect him greatly, but I must confess that I am not very happy with his answers here. As Mina points out, it is a distinction that we can make without using the Cappadocians who are not really a part of our tradition (though St. Basil certainly is, and is quoted in one of those links; that's nice to see), but it's not really something that is as explicit in OO tradition as it is in EO, because it is such a late development. So respectfully I think that sources like the one you've found are in unfamiliar territory, and hence are more likely to make mistakes or phrase things in awkward ways that lead to potentially troubling understandings. As someone here (I can't remember who) once posted in the last thread started on this topic (I can't remember the exact title, but it was started by user "Gorazd"), it is not necessary or perhaps not even appropriate that the Copts or other OO adopt this distinction in such explicit terms as the EO, because our spirituality shows experience of it anyway. I believe the exact example was about hesychasm: You are unlikely, outside of this board in the real world, to find very many Copts familiar with the hesychastic practices so well-known and described by the EO, but that doesn't mean that our monks, for instance, don't practice the same. We just don't have a developed literature or theory around them, or whatever you'd call it. But that's because it isn't necessary in order to just do it.
(i.e., the EO had to, in a sense, "codify" such things in the face of challenges from the likes of Barlaam of Calabria, who was of course a Byzantine problem, not an OO one, so we never developed such language and ideas to the degree that the Byzantines did.)