In terms of tonality, I would recommend going to any graph comparison tool, like this one, and adjusting the frequencies to the target, or to your preference, using the Equalizer tool. You can then use any EQ program or app like equalizerAPO or Poweramp for android, and have the IEM sound to your preference. KZ's are notorious for their V-shaped "house sound", so from my experience, I'd definitely recommend eq'ing them.