Learn English – similar between or similar for

among-betweenexpressionsprepositions

For a research project I have a question about the correctness of the following phrases

The mean activities were similar between group A and group B.
The study demonstrated similarity in terms of antimicrobial activity between product A and product B.

Is the word "between" correct here, or would "for" or "of" be more appropriate. Thank you for you advice

Best Answer

Use 'in' instead of 'between' here.

"The mean activities were similar in group A and group B. The study demonstrated similarity in terms of antimicrobial activity in product A and product B"