There seems to be two kinds of superposition. One refers to superposition within one branch/world. Here it is difficult to maintain superposition because you have to shield it from the environment. The second kind of superposition involves branches/worlds, this is where you have Schrodinger cat that is alive or dead. Or Covid positive or negative where you have both status and leads separate lives, one life intubated or in the miami beach. I just want to know the official terms for this two kinds of superposition. Or maybe it is simply referred to as Copenhagen superposition and Everettian superposition? There must be more specific terms. What could they be?