We own at Samoset (Rockport, Maine) where the units (...according to RCI, anyhow) have "partial" kitchens. In that specific instance, the "partial" designation is apparently (and solely) the result of there being
no oven compartment beneath the multi-burner cooktop. There is, in fact, a dishwasher in that space instead.
There is a normal (i.e.,
not just "bar-sized") refrigerator, a wall / cabinet mounted microwave
and a separate, small convection / toaster oven on the counter.
In short, "partial" kitchen (at least in the specific instance of Samoset Resort) apparently means little more than "no oven compartment under the stovetop".
We don't exchange anymore and I don't claim to know the difference between "mini" and "partial" kitchens. I am merely offering some first hand observations from experience at a particular facility; observations which do not seem to comport with the "partial" kitchen description as quoted and highlighted above in blue.