to compare two items, which is the correct order of body shifting?

When two distinct items are compared, then the similarities and differences are shown which helps to better create a clear distinction between them.

For example, when a person is making a comparison about the characteristics of a standing fan and a ceiling fan, he would most likely say:

The ceiling fan is hung on the ceiling, the standing fan is on the floor
They both create wind which can help to reduce humidity in a place
They are powered with electricity, etc

Please note that your question is incomplete so i gave you a general overview so that you can better understand the concept.