They are not the same, they have the same logo but have different functions (and the same depending on call connection status).

Only the button in the centre console can pair a new phone.

The button on the MFSW is only for answering and disconnecting calls or selecting VR (or last number redial if you don't have VR).

So yes, if you want to pair a new phone (or delete old phones) then you have to replace the console (temperarely).

I believe jochen navcoders can (or could) change pairing code, but why would you want to??

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Sept 03, M3, Silver Grey. Retro-fits: Modded Mk4 DVD Drive, OEM Bluetooth, VR Control, Rainbow Speaker Upgrade, Sony SOT Amp, HK Sub, CCFL, Intravee II, NightMode.