I could be wrong here, but I thought the bump steer problems of the past had been sorted with the introduction of the offset rack mounting bracket. This has been standard since before the introduction of the 270,360,420 range. Maybe the differences Andy felt were more to do with differing specs between the 2 models , ie wheels/tyres, road/sport suspension, anti roll bars etc., and also the set up of the car. I know my own car which is R spec can be uncomfortable on some minor roads with lots of camber and dodgy margins, but track days and sprinting it feels great. Maybe a case of horses for course.