Some earbuds are treble-heavy, while others are more inclined towards bass. This is a purely personal preference, so it’s a good idea to test them out and see what you lean more towards.
Also, make sure the soundstage offers depth and space so that the instruments don’t sound like they’re all clustered together. You should be able to hear the different layers and little details in a song. Sony’s WF-1000XM5 buds are one of the best-sounding wireless buds you can find.
It’s nice to have a companion app with an EQ curve that you can tweak your preferred sound on. An average consumer might not care about this a lot, but if you’re an audiophile, you might want to look out for this.