Comparing pictures example 

 

A)  WATER BOTTLING PLANT 

B) PAYMENT BY PHONE

The pictures are similar because they are both about technology. 

Both pictures are related to technology used in commerce and economy. In picture A we can see how technology, in this case an assembly line, can make the process of bottling water easier, whereas in picture B we can see someone paying something already bought by simply using the phone.

The pictures are different because picture A shows an industry with an assembly line whereas picture B shows only some simple devices such a dataphone and a mobile phone.

Another difference could be that in picture A you need to invest a lot of money in that kind of technology whereas in picture B the technology is much cheaper .