Useful phrases:
Both photographs show…
In the first photo (the girls are) …, whereas in the second photo (the man is)…
In both pictures …, but one big difference between the photos is that…
In the second picture, there is … I’m not sure of exactly the right word to describe it – but it’s …
Another difference is that the people in the second photo are clearly…, while the people in the first picture must …
Compared with…
Finally, …
To sum up…
Talking about differences:
One of the most obvious differences between these two pictures is that…
What makes these two situations completely different is the fact that…
While the first picture discuss …, the second one is focusing on…
The first picture…, however, the second one…
The first picture describes… whereas the second one…
Although the first picture shows…., the second one…
Talking about similarities:
In both pictures we can see… One similarity between these two situations is … Another similarity might be that… One thing that these two pictures have in common is that… They all depict…
The topic that connects them is…
Each picture illustrates how…
All the photos show problems which… One thing that these two pictures share is that… These two pictures share the fact that…