Why go
The choice of station affects a first walk through the city. São Bento places you near the historic centre, while Campanhã can require an onward connection; both are useful starting points when matched to the actual train service and your accommodation location.
The full story
Train arrivals in Porto are shaped by the difference between São Bento and Campanhã. São Bento sits close to the historic centre, so it can be convenient for central accommodation and an immediate walk into the city. Campanhã is farther east and often calls for an onward connection, depending on the service and where you are staying. This is worth checking before departure rather than treating the two stations as interchangeable. Porto's slopes also matter after arrival: a short route from a central station may involve a climb or cobbled streets. International and domestic routes, station calls and connection times are operational details that change. Confirm the final station on your ticket and plan the last leg with current rail and local-transport information.