That aside, yes, they are helpful to people with physical disabilities.
>- I can sense the current MUCH more than the other approach.
Yes, it concentrates the current into a smaller area. I do not know how much current the FG can output, but if you were using wrist straps and footpads with the CCa, you could get some bad burns, especially at the negative wrist band.
Also, from my experience, the wrist bands that you are using have a higher resistance which limits the current somewhat.