The systems are different. The Vogue has a 'Premium' system based on a single DSP amplifier whilst the HSE has the 'Hi-Line' system based on individual door amplifiers. The impedance of the Hi-Line amps is not 'standard' and, as such, I suspect requires impedance matching circuits to be inserted between the Parrot system and where it breaks into the cabling between the head unit and the amps. See here for details of the circuits which can be made up if you are handy with a soldering iron.