A quick calculation of the angular size of the Great Pyramid as seen from the ISS passing directly overhead gives me about 2 arcminutes, which means someone with a good eyesight would be able to resolve it, but not its shape.Doesn't explain the discrepancy on the shots I posted then. You can't tell me both are the same exact view, when one have the picture filled by half of the mediterranean, while the other is Cairo outskirts with great details.
I literally posted 2 real life pictures side by side.
So yes, the picture was taken with a zoom.