The "full" aspect often refers to a complete set that includes the front hair (bangs), back hair, side extensions, and "extra" pieces (like ahoge or ribbons) that are all compatible with each other.
It is important to note that many CM3D2 HairV2 assets are forward-compatible with Custom Order Maid 3D 2 .
They are built to work with modern modding frameworks like Sybaris or BepInEx , which are standard for running custom content in CM3D2 and its successor, Custom Order Maid 3D 2 (COM3D2). Technical Integration: V2 Hair in COM3D2