È abbastanza tempo per ottenere un’Eurocity direttamente? O devo passare attraverso il controllo dei bagagli?

It’s well enough time in theory, provided your train is on time. You board the EuroCity direct just like any regular train, without any luggage control (those are only for the Eurostar to London). However if your ticket is tied to the EuroCity Direct 9527 specifically, then it’s probably a good idea to take a train earlier to Brussels just in case (the ticket is valid on any train to Brussels regardless, if there is a schedule restriction it will only apply on the ECD)

also: do check on NS International as well instead of NMBS International, it might be 1€ cheaper