Figuring out how to install your products and find them after you have installed them is a poorly documented area.  New users almost always have trouble with this.

The path "Poser Formats > My DAZ 3D Library > Pose > P3D Jake and Jeffrey" contains morphs and material for the M4 version. The Head and Body morphs in "Jake > !Morphs" and "Jeffrey > !Morphs" are for M4.

The Skin mats in "Jake > DAZ Mats" and "Jeffrey > DAZ Mats" should work on Genesis, since Genesis will support M4 skins, but this product has Skin Mats in the Genesis install that I would use with Genesis. The M4 morph injections definitely will not work correctly with Gensis.

The path "DAZ Studio Formats > My DAZ Library > People > Genesis > Characters > P3D Jake and Jeffrey" contains the Genesis morphs and DAZ skin material. There are Gensis injection morphs in "Jake" and "Jeffrey" under this along with skin presets.

I don't actually own this product. This is based on the Readme file I downloaded for this product.