Ok, I don't know the posts which makes people have doubts about Agro's question but I understand his position.
Indeed, I think it is his first RB unit and even if his instructor has explained in details the caracteristics of the oxy cell (here a simple R22 like in most of the units out there), I suppose the instructor was bound to say that cells should only be bought from the manufacturer.
Agro, not knowing what he doesn't know, just followed the directive and didn't realize that these cells are quite generic.
I don't know if it is the implicit policy of Divesoft, but it won't surprise me that, maybe for legal reasons, they tell the instructors to make sure the students get the feeling that the cells should only come with their logo.
Hence his question which appears a bit strange coming from a RB diver. But maybe a lot of new RB divers have been told the same...