Alright all you phero gurus! I’ve been wondering where the line is drawn between these two wonder mixes. For those of you who wear them both, what’s the difference for you?
Ok for me…
IS/B is softer, its sexier, I get treated more girly. Get compliments more, I notice more staring and more approaches. The reactions seem to build.
MX135 is more blantant in its approach, the reactions I see with this one are sort of more hard hitting. More Flirting and innuendos as well as compliments a real upbeat almost party like vibe. I will get hits from a farther distance.
Just for reference. We of course do not know what is in MX135 exactly.
From my notes I know its TAH heavy with a trace of cops.
Speculation by wearers is that it has TAA and P83 in it. P83 was released at the same time and they came together. It has 8 pheromones at 54 mcg per spray. Chocolitini scent.
IS/B is also TAH heavy it contain nols and TAL as well. 5 pheromones in total 35mcg per spray.
Thats all I know LOL sorry.
Tisha
Jasmin’s “kitchen sink” post gave us a little more information about what’s in MX135: MX257 P104 Its a hit !! - #13 by Jasmin
Great find Laurie, and I asked that question and didnt add it to my notebook (bad tisha) LOL
Reps 
Tisha
Now that I think about it, for me, MX 135 has the Pepe Le Pew effect. It’s cool if you like the guy too, if not spare the air…
Instant Sexiness is like a dash of glamour and cool confidence, not enough to get anyone to do anything you unless you know them already and have other stuff on, but enough for people to take notice.
I do recall when I first started, I was complaining how they just stare. Not on MX135, they come up kiss your hand, cut in dancing, try to lock you between chairs so you won’t leave.
However, if you wear it around a psycho ex…BEWARE.
You ladies are the best! As always, your input is greatly valued. 
For me IS/b feels nearly the same as IS/a, perhaps slightly softened but still a strong confident sexy vibe. Mx135 is pink, girly and adoring, I feel nice when I wear it.
If instant sexyness were a fruit it would be a perfect tart apple, mx135 would be strawberries with a chocolate fountain. Appletini would be an awesome scent addition to the custom menu!
Ooh, good choice, ink. I love apple scents.
I too noticed more blatant hits with mx135 more so than with Instant Sexiness B.
With mx135 you get flat out stares and approaches. Mx135 seems like a very well rounded mix, it, in my opinion, has Instant Shine qualities, but is super feminine and sexy, and people feel comfortable around you, like doing things such as touching you as they talk to you and so on.