The two modules might have the same specifications, or they might not have the same specifications. It depends on the exact model/part number.
SCA and SC0 mean the version of design used for the SODIMM modules. In this case there is a slight difference in design of the respective modules.
These two modules might work together compatibly and in dual channel mode, or again they might not work together compatibly. This is dependent on the actual characteristics of each of the modules (beyond voltage, frequency and timings).
It should be noted that even if trying to use two individual modules with the exact same make and specifications, there is no guarantee of inter-module compatibility.
It may require trying...