Probably the difference between heated and non heated?
I've just been contacted by someone else at the same VW group dealer but from another town (guess they don't speak to each other haha) and been given price of £8.87. I'll be getting a key cap too at £9.40, otherwise wouldn't have left the house for 12p saving
The first guy must have given me the price for the heated one, even though I didn't mention what it was, purely part numbers exchanged.
Good there's a forum with knowledgable people like you to save people like me a few quid