Pic of some Q images - all scaled 25% just for this example.
One thing I noticed with Q images is that some have black borders (top row) - while others don't (bottom row).
As for those with the black borders, the information being relayed is in the picture and it's easy enough to crop the image, so why the borders?
The Shanghai pic especially (top right) could easily be cropped in the same way as the 2 ships pic has.
Probably over-analyzing but with/without borders changes the image sizes (pixel dimensions and Kb/Mb).
Cropping or adding borders/framing can make things very specific.