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Your marketing stand shows the more expensive models as being faster? ;)
60kg rider / 30kg bike and gear / 100 watts. Non-Dynamo Hub = 23.83km/h.
Most efficient hub: on – 23.29km/h (5.25w extra drag) +2.3%
Least efficient hub: on – 23.19km/h (6.25w extra drag) +2.7%"The most efficient dynamo hubs when switched ON add between 3min 24sec and 5min 47sec to a flat ride over 100km when compared to a regular hub."
https://www.cyclingabout.com/dynamo-hub-drag-lab-testing/So even if you double the least efficient dynamo your adding only a few extra minutes over every 100km. That's beyond negligable for commuting and only slightly affecting times at a 200km audax - which I'm sure could be gained back elsewhere in bike position or tyre tread.
Round of applause for the ultra endurance cyclists who need to maintain the minutes over slow cycling for weeks on end against the clock. The 99% of other cyclists will never need or nor notice any demonstrable difference.
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youramericanlover
sbbohr
Highly inaccurate.
Spin and Shimano next to a SON and you can see there is a huge difference; we have a demo stand to show this. Shimanos work well, but they are slower and heavier!