The 3rd picture is unfortunately not correct...

Yes - the picture is wrong - I can't see the one in picture 3 "just now" on geizhals. But it tends to cost about 3 times as much and will be class M.
But I can say about the 2512: Incredibly good P/L ratio - I would buy again immediately - only the accessories are a bit too cheap,

The third picture is wrong. The others are correct. The hoover cannot regulate the strength of the vacuum.