@Uilebheist @feorag it's the same one, you can change at either Gallarate or Busto Arsizio
(I've just been told by a person nearby that they usually change at Gallarate and the sign with the trains is pretty big and convenient, you only have to be sure you're looking at the partenze (departures) and not the arrivi (arrivals) one)
The railway line is the same where this morning one train arrived on time, so unless there are further rains and unrelated disruptions there shouldn't be significant problems