I might be wrong, but on my understanding and if I do remember well it's the same ship. 1st stop Belgium (Zeebrugge) and 2nd Netherlands (Amsterdam).
As a rule, all shipments of Model 3 go via Zeebrugge.
There has been the odd exception eg last year December when the NL tax rules were about to change a shipload went direct to Amsterdam and customers collected their cars from the dock.
Generally all the cars are unloaded in Zeebrugge and are crossloaded to other ships for onward passage to Norway, UK etc. Last quarter there were large shipments to the UK and so six of the seven ships unloaded in Zeebrugge but then went on to Southampton to unload the UK shipments.
Last quarter however we saw that Tesla was having, on a couple of occasions, operational problems with Zeebrugge and so the last month or so was an opportunity for operations there to be reviewed.
Given the all the logistical benefits of Zeebrugge it would be a brave decision to move the port of entry to elsewhere in Europe.