Missing packages in the diff? I do not understand this question.
To me, it sounds like trying to sound like Microsoft.
Very generic. But it does not surprise me in the least that Canonical mimics MS in some ways as they mimic MS in many other ways, too.
On this topic, you are definitely among like-minds, Thanhatos.
From the point of view of the Zorin Team, (I am speculating) it may be a balancing act. Having Canonicals Software Channel may offer that 'familiarity" to Windows.
On the other hand, it may also be that same familiarity of what people dislike about Windows that they want to get away from.
Fortunately, this is Linux and we still have several other options. Synaptic is one such, but not the only one.
But Synaptic Package Manger is a very good one and while the first time opening it, it takes a small amount of learning, it becomes familiar very quickly and is one Very powerful GUI tool. It can manage updates, upgrades, uprgrading, adding or removing Kernels, showing broken packages, fixing them, handling sources.list and repositories, showing recent installations, showing all available packages that can be installed in a list…