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Note in that R&T article, the OD between the 22 and 23" wheels, instead of the tire's OD being the same, it's 1.3" taller...so, a little more sidewall because of the change in tire/wheel combination. It's not just the aspect ratio, it's the width in combination that gives you the OD. Note, one or the other is incorrect...the diagram says one thing, the text says another. When I run the numbers, it appears to me that the diagram's dimensions are correct when rounded off to the nearest 0.1".
So, in this case, the larger wheel has a taller sidewall, so has the potential to ride better. That is not the case with BMW OEM sizes which are all the same OD, so as you go up in wheel options, your sidewall height decreases.
A real comparison would have had the OD of the tire/wheel assembly the same and then you'd likely feel a difference in the ride.
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