Hm, well I guess it also really depends on what exactly you want to measure. If it is the effectiveness of measures, the you have to take into account almost all of them operate on reducing the chance of transmission.
The following is the number of covid19 hospital admissions (cumulative) in the Netherlands (
source)
This pattern
was already in place by the time the first cases were being reported. The pattern largely reflects chance: people returning home from holidays in N Italy (from locations where the pandemic hadn't yet surfaced there either) and subsequently partaking in Carnival festivities, which happen to be celebrated particularly in the South). There was another introduction to the South that can be traced just across the border to Germany in the same timeframe. This happened in the brief window when the virus was still largely under the radar.
None of this reflects a difference in policy. If anything measures were scaled up earlier in the south. In the North they are still tracking and tracing.
Moreover, the pattern is quite stable, despite the fact that measures are now rolled out across the country. And that's becaus measures impact transmission rates, and these need to be multiplied by the number of active cases.
In other words, the 'baseline' on which measures act is going to vary greatly from place to place and with it the tally of cases and deaths.