It's true that the BionicMobileAssistant adds navigation capability which is essential for its function as a mobile robot, and the parent post rightly emphasizes that this mobility is a key feature that differentiates it from a simple arm.
However, it is just as plausible that the core system, the ability of delicate bionic manipulation of objects, comes from the Festo Bionic Handling Assistant.
If we consider grasping technology as the main innovation, then the Bionic Handling Assistant remains the base, and the mobility of the BionicMobileAssistant is just a useful extension, like adding wheels to a high-performance blender; without the blender, the wheels are useless.