No... If I'm understanding you correctly, they don't work like you're thinking in comparison to SERMs. Maybe I'm misunderstanding though.
SARMs are designed to act on specific regions androgen receptors in the body, with the hopes you can target very specific areas. However, none of the SARMs developed so far are specific to 100% anabolic effects. You can still experience virilization from some, and you may not experience much of anything from others.
Simply put... SARMS are too high risk, too high cost and next to no reward. That's the best way to summarize it.
I find more bad sides with sarms and I have tried a variety of them along with some of my clients - rashes, hives, heart palpitations, insomnia - so i guess I could say they work well for the sides you don't want.
If she's used var, there is nothing like it and sarms will not even compare to it.