Someone checked for me already 
The fan is blowing offset, but it seems the slicer is playing a role too. Ive noticed that printing with 0.16 mm height is getting the best results while printing on lower heights does make it worse. This should physically seen not happen.
I will try his suggestion and dry my filament over night and see if the curling can be reduced. Still there is something odd and working differently as on other printers. If we can identify this, Im sure we will find a solution. I found on printables a front cover for aftermarket nozzles and LEDs. Im not that good at CAD but maybe the guy is nice enough to recreate the cover for optimizing the attack angle.
Still there are people who have problems with bigger overhangs, but maybe there are more factors playing a role each on its own. Slowing down the print for overhangs while having the same temperature is a problem in my eyes. The cooling not being exactly centered comes in too. Maybe there is a sum of all this creating the common overhang problems. In the post Ive linked ppl say old slicer variants tend to work better. To evaluate this I`ll try to setup a profile on Prusaslicer tomorrow.
With a bit of luck and good teamwork we`ll find the ghost in the machine 
Edit: The aftermarket nozzles seem to be 2mm longer. I`ve ordered one to see if I can improve and to test brass nozzles for better heatconducting