Both of the object files are named 3DUSara2, so either will overwright the other.
I always unzip to a temp folder first, DAZ installers I install to a blank runtime if it's an update or something.
If needed, I change the folder names and point the .cr2 to the new folder.
I often have a hard time finding stuff after I install, so this way I can browse through the folders before I add them to my now 12GB of Poser content.