I couldn't say, I am saving the main quest for later. As for the hurt sounds that a Khajiit make, it sound like a a normal human. You don't hear Khajiits make any kind of roaring or meowing sounds if you were expecting something like that.
I would have to assume base on that, that they will sound like any other character that you can make. The bandits speaking of killing their cousin cats is quite funny though but that just a dialog change.
According to the CK, there's a voice for Male and Female Elves, Orcs, Khajiits, Argonians and humans all seperate, in addition to the voices of 4 dragons, 5 unique people and the draugr voice