Identity of conscious aspects argument

Of the arguments against superimmortality, the prediction that identical structure and functioning of matter will produce identical consciousness and ixperiencitness is that another body can not produce the same consciousness or ixperiencitness. In other words another body is not you thus it cannot produce or be you. Aspects of an objects can be identical like color, shape, chemical make up, placement of cells, function of cells, number of cell in an organ or body, number of live cells in a body, percentage of functioning cells in a body or organ. the way cells are connected, the way the cells function, etc. When a thinker makes a statement that two different bodies can not produce identical consciousness and ixperiencitness what is the proof or at least arguments for this statement. There are several statements that are often made in defense of this belief "Well I just don't experience that other consciousness produced by that other body thus it does not produce my ixperiencitness." Everyone knows that every consciousness is unique. You can only experience one consciousness at a time.

Identity of behavior argument for superimmortality, You can only experience one consciousness at a time argument, Every consciousness is unique argument