Yes, they all use an electric motor of some kind to reduce steering effort, some sensors and a control unit to figure out how/when to do that. But that's about it, and the actual execution of that is what makes the difference.
You can use a power rack, you can use an electric assist on the steering shaft (like would be used on our cars). You can change the number, type, and sensitivity of the sensors that read the steering inputs. You will have different hardware and capabilities on the control units. You will have different software to change the amount of boost and sensitivity of the system. On my wife's 2013 mustang you could change the mode (amount of boost and sensitivity) right from the drivers seat with a couple of buttons.
It's like saying the stock hydraulic power steering for these cars and the aftermarket Borgeson conversions use the same technology. Yup, absolutely they do. And one is such a massive improvement over the other it's not worth talking about the fact that they both use a hydraulic pump.