For comparison, there is no service on Dutch domestic trains (even in 1st). Venlo is a border town about 25km from Dusseldorf, trip takes 2:10 from Schiphol direct and costs ~28/47 EUR for 2nd/1st. No advance tickets available, off-peak only with a travelcard.
ICE has dynamic pricing starting at 20EUR advance tickets Amsterdam Centraal - Dusseldorf, takes also about 2:10 but all the way. Not sure about service.