I'd expect the UK to have slightly higher average speeds, as it's nearer the Atlantic. Searching "Europe wins speed map" suggests it's close, with the UK sligh

I'd expect the UK to have slightly higher average speeds, as it's nearer the Atlantic. Searching "Europe wins speed map" suggests it's close, with the UK slightly higher. The speed in a typical city might be higher in the Netherlands, as large cities in Britain have a more varied setting. I don't know.