The surrounding building is not influencing the daylight factor. I am wondering what is wrong with the model. It works perfectly fine with another design. I am not able to figure out where the problem is in the file. Could someone let me know what is wrong? I have highlighted the component in red in the gh file.
Besides @devang’s remarks, you can see that the results are not the same. They are close but not identical.
One of the reasons can be that according to your south angle and the occupancy hours, the context is blocking the sun just a few times. Not enough to make a big difference in the results, but enough to show different results.