At the end of the day, people will just buy what they want, if a "price" differance affects them they will choose with budget in mind, however if they are the sort of racer where price is irrelavent then they will choose what they like the look of best. At the end of the day people like choice!!!
(BTW, The X6 Squared is between £145 and £150 in stores - not £155 and the X6 Sq EC
entire car is £270)