I'm pretty sure they're two different women. I saw Nadine at Plush earlier this year, and I remember seeing the Loco Nadine, just once, right after reading the thread about her being a scammer, sometime in the last 3 or 4 years. Both had large enhancements, but the Loco one's were outrageously huge for her relatively short height. And I doubt the scammer would keep using the same name.
And there was another Nadine, a black girl with very real breasts, who was regularly at Loco, so don't be afraid of her if she's still working at the Mid-way Invader.