They both look like gravid females to me. The gravid spot isn't a telltale indicator of whether or not the fish is gravid. If you look up 'fish gravid spot' on google, check out the first result that comes up. As the people on that thread said, some fish will never get a gravid spot, and you can't see it on others (for example, you can't see it on a black Molly), so you mostly have to rely on symptoms such as size of fish, appetite, and activity.