One premium feature which the VW kit has that neither the Fiscon nor the MoBridge has is voice command. This means it is much much safer for drivers to use to the phone.
It also means that there is one button that neither kit uses and that is the little mic button on the left of the MFSW.
MoBridge therefore is not accurate when it says it has the same functionality of the VW kit. If you look at the pdf, there is no reference to the mic button nor voice activated control at all.
All said though, it depends on how much you value voice activated controls for your phone versus the ability to pair more than just rSAP phones.