If some DACS handle sibilance better than others it means that those particular DACs are surely enough altering the original sound.
If sibilance is there and a certain DAC reduces it, then that DAC would alter the original sound of all the music. I would conclude in this respect that it must be inaccurate, and in doing so is “colouring” the sound, so to speak.
I thought that term was only ever applied as a criticism of analogue turntables and tape players.
Maybe DACs are as coloured as analogue?
l know to my ears digital is more “analytical” than “coloured”, but which is perceived as best is a question of personal taste.