Right now, for the purposes of the taxon page calculation, every identification counts the same. However, if you look at the observation page, you can see that in some sense luiscarlosrodrguezmndez is getting more “credit” for the ID because the ID is labelled Improving, meaning “First suggestion of this taxon that the community subsequently agreed with. This identification helped refine the community taxon.”
There has previously been some discussion about whose name should be displayed as the top identifier on the taxon page if there are multiple people with the same number of IDs (e.g. here), but I believe that it’s currently alphabetical and no one has yet submitted a request to set it to something else.
Edit: it’s not alphabetical, nor is it in order by user id number. 