As far as I know, the NR option is only available in Brampton and Durham region. Most Toronto MPs have abolished the $100 NR half hour option (there are exceptions but most people here don't seem to visit or review these places).
Here is what the two things are SUPPOSED to mean:
NR - She immediately gets naked at the start. You're on the table and she, standing off the table by the side, massages you with her hands. Sometimes you may be lucky and she hops on the table to sit on your legs but her hands are what's working your body. Occasionally, her hands grazes your parts and throughout the session, those hands continue to tease at what's to come. You then switch turns where she's on the table and you're off the table. You can request that she lies down on her back. Touching is only via hands and generally on the shoulders, back, legs or butt (if she's on her stomach). If she's on her back then hands above the waist only. Depending on how you're situated, her hands will still touch or rub against you, continuing the tease. Most girls will not allow you to touch them with your mouth though sometimes, depending on the girl, she will maybe allow some kissing on her tits but don't expect to be able to linger there. The finish is typically done with her hands, typically one performing the deed while the other teasing.
BS - You're both on the table at all times. She could start massaging you with her hands but eventually there should be full body contact (her chest and stomach touches your whole body length). Her lips may touch various parts of your body (ymmv). Tit play is more liberal (ymmv). Some girls may allow your hands to roam more freely (ymmv). If the girl allows kissing, she would likely do it at this level (ymmv). Using other body parts to finish you is permitted (ymmv).
Here's what usually happens (especially in Brampton):
NR - She tells you that is not what most people go for and if you choose to stick with this level, she shows some sign of disappointment that she didn't make an extra $20. She may or may not remove her clothing at the start. You're on the table and she, standing off the table by the side or even at the end where your feet are, massages you with her hands. A lot of time goes by and she's still massaging your thighs or back. Your only eroticism at this point is the occasional visual through the mirror. Her clothing should be off by this point but it may not be. After a long ass time, you then switch turns, where her clothing is finally off. She will definitely be on her stomach while you're off the table. Her legs are clamped shut. Touching is only via hands and generally on the shoulders, back, legs or butt. You tell her to flip over and she does so hesitantly. Hands above the waist only. During this time, she will not touch or rub against you. Most girls will not allow you to touch them with your mouth. After maybe five minutes of this, she will tell you time is running up. The finish is typically done very roughly with her hands.
BS - She starts massaging you with her hands standing off the table by the side or the end. Eventually (length depends on the girl) and if you're lucky, there should be full body contact where your bodies are parallel to one another (ymmv). If you're lucky, her breasts and stomach will be sliding up and down the full length of your body but once in a while, you'll find someone who just kind of plops there and do nothing. In her mind, the idea of her breasts pressed against your chest is enough of a titillating ride. Many girls will take suggestions or direction but a handful will be completely lost and have no idea what they're doing. You may experience a girl who doesn't lubricate junior properly and the weight and friction of her stomach rubs you the wrong way, literally speaking. Her lips may touch various parts of your body (ymmv). Tit play is more liberal (ymmv). Some girls may allow your hands to roam more freely (ymmv). If the girl allows kissing, she would likely do it at this level (ymmv). Using other body parts to finish you is permitted (ymmv).