To answer this question you have to compare the same trip by plane and by train. The actual travel time is shorter for the plane but if you add up the commute, the difference is only about two hours. Plane tickets are also generally cheaper and with some planning you can get one for less 150 €. But you have to add the taxi from the airport to the overall price. But traveling by train is more relaxing and allows you to see more of countries. So to choose one or another you should consider these factors and then you can see if it’s worth it for you specifically.