I do not know why.
But the Berlin server test is more accurate to me than the Munich server test.
Even with high speed internet to Munich
I have a problem with the game
I come to the conclusion.
That the game uses a very bad internet provider
The speedtest difference between Berlin and Munich is likely because of the recieving pc/server and its connection.Basically anyone(/everyone) can become a speedtest.net host.
But i agree,they could do with a upgrade.