What about: "I personally wouldn't have cared about that." -- then you didn't say what you thought she should do, instead just what you yourself would (not) have done.
And she could have used that as a data point when making her own decision.
And, optionally continue with: "you got more education than X, I wonder if that might as well mean that the company decided to invest more money in you, maybe a good thing for you. Maybe X could have filed a complaint about that as well"