Hashem loves all Jews equally, because He loves us the most possible. If Hashem loves me the most that is possible, then if I do more mitzvos, Hashem doesn’t love me any more then He did before, because He already loved me the most possible because I am a Jew. What changed was our relationship. Now Hashem can be closer to me.
For example, a parent loves all of their children equally, but might feel closer to some of their children. If one child is constantly fighting with his/her parents, and the other has a great relationship, the parents are probably closer to the child with the great relationship. But that doesn’t mean that they love the first child any less then the other one.
I think when we are discussing superiority here, we are talking about their closeness to Hashem, because if we are talking about how much Hashem loves different Jews, its all the same.