Well, but what this article is stating, is that those differences you pointed out being connected to gender, are actually due to the sex of the individual, not due to the gender an individual chooses to identify with.
It’s saying these differences are connected to sex, but it’s not saying they’re not connected gender. Didn’t the article say that research hasn’t been done?
It would be interesting to see whether these differences were more or less correlated with gender rather than sex.
It would also be interesting to see what differences there are between trans and cis men/women, and whether/how these change as a trans person transitions.