I don't believe you will get a straight answer, no one's arse is that sensitive. Anecdotally it appears that 18s provide a quieter and smoother ride.Those of us with ACC feel it provides a difference in ride depending what mode you have it in, those that don't seem not to miss it.
All that in mind it tends to be a preference based on your driving style and aesthetics ... much difference? probably not much but given that ACC appears to be standard in the range now it must be enough
Current Ride: MY 16 Daytona Pearl Grey Audi S3- Performance Pack 1, Sunroof and Driver assist
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