All you are saying is that a few blacks have a lower IQ then most whites and a few whites have a higher IQ then most blacks. But it does not change the point that there is no difference in the IQ of the bulk of the two populations.
Sennfeld is a municipality in the district of Schweinfurt in Bavaria, Germany. Historically, along with its neighboring village of Gochsheim, it had the rare situation of being a Reichsdorf or Imperial Village.
But SchÃ¶nefeld (SXF) is connected by trains with the city centre while Tegel is only connected by buses. Thus travel time wise there is no real difference. Or the differences depend in first place where you'll stay in the city centre. Berlin is a huge and widespread city without a single city centre. I would not make the decision which flight to choose on this. Price, convenient flight times, airline are all much more significant points.