Picture 2 is an endcity that naturally generated in 1.12.2

Picture 1 is the same position of the same seed in 1.13, as you can see, the endcity is missing.

Beside that, the endcity in picture 2 doesn't have rooms containing looting chests. It is more detailly reported in MC-134719.

The seed: 8572302611453844238

The location: [-1256 ~ -296]