"a comparison between A and B" or "a comparison of A and B"?



When I have to compare two things A and B, can I say "a comparison between A and B" or "a comparison of A and B". Which is best ?


Posted 2013-02-07T14:48:12.827

Reputation: 599



To keep things super-duper simple:

Both are fine. They mean exactly the same thing.

Use either one. No one will misunderstand you. Both are equally common in everyday usage. In fact, if anything, I would say that "a comparison of A and B" is perhaps more common, even though it may sound slightly less correct. This Ngram would seem to back me up.


Ken Bellows

Posted 2013-02-07T14:48:12.827

Reputation: 4 151

4As a side note, if you were to change "comparison" to "difference" (the difference between A and B, etc), then it would matter, and "of" would be wrong. They are similar phrases, so I thought I should point it out. – Ken Bellows – 2013-02-07T16:53:20.260


+1 You might add that 'with' and 'to' also work. Also, it might be judicious to add a link to the NGram, so users can see just what parameters you employed - and play around with them, as here

– StoneyB on hiatus – 2013-02-07T17:09:46.530

Good point. I added links on the image and the "This Ngram" text. – Ken Bellows – 2013-02-07T17:12:20.217

1I love the screaming headline. – J.R. – 2013-02-07T20:52:26.787


If you compare A with B, then the comparison is between A and B. You could also say "comparison of A with B" as in the following sentence.

The immediacy of effect is assessed both with the observed data from phases 1 and 2, and a comparison of the observed data in phase 2 with the projected data from phase 1.

You could also say "comparison of A and B" as in the following sentence.

Counseling smoking parents of young children: comparison of pediatricians and family physidans.


Posted 2013-02-07T14:48:12.827

Reputation: 20 456


You use between when you are comparing two things and among when comparing more than two things.


Between my brother and sister, my brother is easily the most spoiled.

Tom is the smartest among my friends.


Posted 2013-02-07T14:48:12.827

Reputation: 2 218

2I don't see how your answer addresses the question asked. The poster seems to be interested in the correctness of the expressions indicated, not in the usage of between and among. – Paola – 2013-02-07T18:10:35.553