Déjà vu

The new tram in Stockholm city turned out to be very similar to the Frankfurter one. I would, however, never have noticed it if not for the interior of the tram. It has all the signs in German, such as "Notbremse, Missbrauch Strafbar" or "Fahrerruf". Of cause, this would only mean the vehicle was "made in Germany". But there was another observation that really gave me a sense of déjà vu: The were actually sines explaining how to use the transportation and warning for the €40 penalty for failing to buy a ticket -- exactly the same I have seen in Hessen, and marked VGF -- the transportation company of Frankfurt.

I am confused. I would understand if Sweden had no money to buy new trams and they just ordered used ones from Germany. But at least they had the funds to repaint it from the outside and put the SL logo on it. So why were they unable to do a little interior remake?