To me it has 3 benefits:
-) 250W
-) acceptance of various magazines
-) individual slide programming ( I assume)
To me 50€ seems a lot of money for such projector, such only would make sense if those three features are important to you.
Also you did not mention the lens it comes with. Braun offered lenses of different qualities. Ultralit is the high-end range, Paxon the middle-class.