Both websites have value. They are tools.
I prefer eBird for my bird lists. If I used iNaturalist I would have to make a single observation for every single bird. Today at one spot I saw 25 robins and some other species. . Uh…no…I would not want to enter 25 robins here. And, what if I went down to the lakefront and saw thousands of red-breasted mergansers flying by later in the winter?
Both websites have value. They are tools.
There is an Ohio Dragonfly Survey that uses iNaturalist. I participated in it this past summer. iNaturalist works well for that. They require a photo for a valid entry. You can easily get help from the people in that survey if you are unsure of a species ID.
I belong to a group of birders here in NE Ohio. Some are competitive. Some are not. (I am not.) We all respect what the others are doing. We like finding species and entering them into eBird. It is a tool.