But if she wants to be the best that she can be, it actually might benefit her to compare herself to this girl.
Think of it this way: If you're a bodybuilder, and you want to be the strongest person in the gym, you work out with the strongest people. Eventually, you will surpass them.
By placing yourself against people that are better than you now, it allows you to set goals for yourself and work harder.
I'm not saying that she needs to challenge this girl to a death match, but if she wants to be at the same level as this girl, that might help.