Mess with the technical data

Moin,
I bought the refrigerator not on Amazon, but in the cosmic competition. The shop still stuck a label with the data 126 kWh and 37 dB. (Here on Amazon are given 40 db, call elsewhere also 37. Older Renz ions also 37). At home out of the box then tumbled a data sheet containing the information 139 kWh and 40 dB.
After checking with Beko stated that there had been a change in the noise-measuring method, why would be called now a different value.

For energy consumption: It amounts to LT current sheet 139 kWh.. Here at Amazon, other retailers and in another I present Beko-sheet states: 126th

According to me, the refrigerator does not appear, however, even quieter than z. B. the sold with 38 dB Liebherr a friend. Maybe it is very abstract measurement methods and numbers. I find such an unreliable data confusion still annoying. Especially as it was for me to buy critical data.
The fridge itself is okay. However, the interior looks a bit fragile.