The one from DS doesn't have Spiky Spikes of Spiky Doom, nor does she have a boobs window. And she doesn't pretend going into close combat with that ineffective of an armor, since she doesn't do close combat and has magic to protect herself. From the Lead Designer :
Katarina is one of my favorite characters. The way her guns combine with her magic is actually really fun. For instance, she has a spell (you can see her use it once in the trailer) where she plops down a purple AoE on the ground at her feet that doesn't do damage but pushes enemies back when they hit it. You can create chokepoints with it, protect yourself from melee attacks... it's definitely a very cool combo.
Katarina's model (from the first seconds of the video) in color, if people are interested :
[http://img535.imageshack.us/i/katarinai.jpg/]
And the one for Anjali, for the people who think that all the female characters won't wear armor :
[http://img837.imageshack.us/i/anjali.jpg/]