If you are comparing citation counts for different scholars, keep in mind:
If someone has a very high citation account, make sure that their citations are not the result of working with a very prominent scholar, likely more senior, often at the beginning of their careers. They may well deserve the credit, but probably not.
If someone has begun publishing in year X, and the comparison person began to publish in X-10, be careful that the time to citation does not get in the way of your comparison. Some fields take some time for citations to accumulate. And of course, if you have been doing scholarship for 10 more years, you may well have accumulated lots more citations.
In any case, if there are many collaborators, and they are of equal strength as scholars, I am not sure how to count.