No difference in performance to a normal rod antenna recognizable

Hi, due to the recession here I ordered the same 3 pieces. After extensive testing the following results:
Like this antenna provide an advantage for someone in the relatively free / or 1-5 houses survived.
For someone like me who lives surrounded by high-rise buildings in the backyard, this antenna has not brought much.
Previously had a powered amplifier antenna (goal for 27 stations (in Berlin)
the ordered here antenna (goal for 22 stations (in Berlin)

Furthermore, I have noticed that depends very much of the DVB-T receiver itself. Strangely, my SONY TV with its integrated DVB-T receiver in a position with the 22 db active (price range 12 EUR) rod antenna to find 60 channels + Radio and judder to give back and to scale up
However, my single TVB-T receivers (price range ~ 70 euros) this creates with the same antenna / same location, not even at 30 stations.

The Panasonic TV in the bedroom creates with this antenna 34 stations.

The ordered here antenna provided for me unfortunately no advantage does it justify the purchase. The 4 stations that it has provided more are not smooth.
What I find beautiful is the magnetic base and the adhesive surface, but what's the downside here, this is an angle would have been quite good. Because I wanted to make `s windowsill. But it is longitudinally placed on the magnet, thus the antenna is literally 1cm hovering over the windowsill. Rather than standing upright.