I didn't think it sounded like Katatonia, but I've only heard it two or three times. I don't like the Deftones anymore, but I always thought the Static-X song "Cold" sounded like Deftones.
That's not a fair comment, Deftones have a lot of emotional depth to their music, most Katatonia fans would probably appreciate it!!
They are definitely not a Nu-metal band so forget what you have heard and smaple Digital Bath or Change in the house of Flies off White Pony and tell me I am bullshitting, I dare you!!!