Ok because I feel I need to rejoin for this.
One way you can do it is simply to look at the framing. Of course a Grand Theft Auto game is going to feature prostitutes and strippers and they are going to be dressed in rather scantly ways, this is because the games are about crime, degradation, and corruption.
But if you took Mass Effect and you took Grand Theft Auto and you altered them so everyone is in bikinis there would still be a major difference between the two and how they handle women. Heck put all the women in bikinis and make their jobs prostitutes and you will still see a major difference (Heck if they were, Mass Effect would probably have some of the best prostitute characters in all videogamedom. What with their characters not beginning and ending with being a prostitute, them not really being about sex, and having a depth of character. Only Heavy Rain could contend)
Sexy clothes, bikinis, sexy dances, and even being a prostitute are of themselves not insulting to women (well the prostitute part is debatable, but that is another debate). Yet what is the purpose and the framing being used for it? What is the scope of their use and the depth of their character.
Don't get me wrong, I am not going to say that you couldn't make an argument that Grand Theft Auto's use of women is more of a commentary or is more neutral or possitive then Anita makes it seem (As many of her examples go). Only so much that just because a game requires prostitutes and sexily clad women, it doesn't mean it needs to be framed disrespectively.
The way usually can tell if a sexy looking character, who isn't wearing something egregious, is just sexy or is eye candy... is by where the Camera ends up looking and how she is treated by the narrative.
Lucy from Fairytale for example, in at least the early run, is such a sexy character with exceptionally large breasts especially when compared to the current cast (One of whom wears non-boob armor). Yet, once again in the early run, the Camera never swivels to her breasts or ass and not only that but is the one who completes her own story and even gets a few battles in. This changes later (and I wish it didn't...) but if it stopped there...