Since the Scart cable thick and stiff and the plugs are huge bugged me this combination but then a little and because the DVD player had an HDMI jack, I decided to buy a high-quality HDMI cable, not least because of the reviews here in amazon. Googling had provided earlier: what can bring or not, (/ irony on) very helpful so (/ irony off).
Since one can connect both cables easily to test parallel I did that and took to test the movie Madagascar2. There are many settings where the surging lion's mane of 'lead actor' is Full Frame the picture, so was by switching between HDMI and Scart a direct comparison possible.
Conclusion: the transmitted over HDMI picture was clearly sharper, more detailed and color-rich, several test viewer have confirmed without regard to the just switched connection.
I can say for my device combination it brings what and is recommended. A strong buy recommendation and 5 star.