Hi, I am looking at two 2011 cars here in the UK, very similar spec, both Titanium Silver, main difference is carbon mirrors & engine trim + lightweight alloys on he more expensive car on a lower mileage (1k miles). The cheaper car has around 4k miles. I know the difference in mileage is really nothing in the ordinary world, but how mileage sensitive are the values of these cars. It is quite a difference in price (15k GBP). Any thoughts on the best choice?