that is a member from another Oscar Fish forum. I believe she's been keeping Oscars for a while. I haven't gone through every question but she is one of the few people who can be relied on for good information. Unlike a lot of the other people on the forum that she frequents, she doesn't talk just for the sake of it.
the two photos show a male and a female sexual organs.. however, it's easy when you know where they are, it's still not easy when you look at a fish in your tank. Unless you absolutely need to know the sex of your Oscar, [for financial breeding reasons] I should just wait for them to pair off naturally, rather than stressing them out by removing them from the tank to inspect them