From the looks of it the ones she's performing is classical pieces like the ones being played In your lie in April so I don't really know if she'll have a chance to use those especially on competitions.
ch2p36p6 THAT GOES FOR KUROSE-KUN ISN'T IT? --> Same/That goes for Kurose-kun -/too, doesn’t it. (before/after slash are two versions to improve that phrasing).
Another option: "It's the same for Kurose-kun too, isn't it?" or shorter but grammatically worse "Same for Kurose-kun too, isn't it?" or perhaps "Same with Kurose-kun, right?", depending on how much localizing you want to do.