There is a big difference between the two vacuum cleaners.
The Siemens is compared to my bisherigem sucker "whisper". This is a bit exaggerated, but to bring the really huge volume difference expressed. One can now suck without it noticed the neighbors (multi-family house, old building).
The Siemens has only 700 Watt, my old 2400W. The Siemens has a truly minimally lower suction power, but perfectly adequate.
The only drawback: I'm no longer under the bed with the essay. He is half a centimeter too high. Blemishes.
In sum, the new vacuum cleaner is by far better than the old.