Which property would you buy?

Hello everyone! Which property (number 3 or number 6) would you buy and why? My wife and I are undecided... It is supposed to be a city villa. Thank you very much for your help!

I need a magnifying glass. Enlarged here:

Can you say a little more about the width and length respectively? Is the house allowed to stand at the 6 everywhere?

I would take No. 6. The west is free of development, there is no need to worry about the south. I would like to approach the property from the east and also move the house more towards the east. The building window seems to allow for that.

Attached is the plan with the dimensions.

Phew, with 18 meters width you run the risk that a city villa with 10 x 10 will be cramped with a carport/garage. You could possibly arrange them offset. hmm...
Read through this thread, then you'll know what I mean