You can't go wrong here. Two very decent sets, those two. Just put one set on, and save the other for next year. Pickiniess concerning strings comes with increased age...
Of course, if she does start whining like crazy, you could always change.
By the way, I guess this is uncalled for, but don't change strings unsupervised by someone who knows the craft. I did that when I was 13. I got quite confused as things started coming apart after I had taken off all the strings - how was I to go on from there?? I was lucky I had laid the bass down, so at least the sound post was still standing...
