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Whats the difference between these sentences.

1. Scientists have made a comparison of molecules and atoms in the past.
2. Scientists have made a comparison between molecules and atoms in the past.
3. Scientists have compared molecules with atoms in the past.
4. Scientists have compared molecules to atoms in the past.

when to use "comparison of" , "comparison between" & "comparison to"
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To my ear, the verb version and the noun version are interchangeable. "To compare" is "to make a comparison."
I compared A to B.
I compared A and B.
I compared A with B.
I made a comparison of A and B.
I made a comparison between A and B.
I made a comparison of A to B.
Comparing A and B, A is larger.
Comparing A to B, A is larger.
By comparison, A is larger than B.
A, compared to B, is larger.
A, compared with B, is larger.
Compared to B, A is larger.
Compared with B, A is larger.
(Some of these may be a tad lower register.)
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akc Whats the difference between these sentences.1. Scientists have made a comparison of molecules and atoms in the past.2. Scientists have made a comparison between molecules and atoms in the past.3. Scientists have compared molecules with atoms in the past.4. Scientists have compared molecules to atoms in the past.when to use "comparison of" , "comparison between" & "comparison to"
Comparison /of older and younger patient