Yes unfortunately Rich they are different, so are the passats, you can split them down if you fancy a bit of a challenge
you would need to take the wiring out then take the retainer off the large spring this will seperate the base from the the mirror just needs changing round then.
But beware the retainer on the spring needs a lot of pressure exerting onto it to get it back on, I've done it by hand but it is hard.
Darren