I don't know how close to the reference figure you meant to go, but here's what I see:

Your face is wider, and I like it better than the original.
There's some dark patch hanging from her shoulder, and I don't know what it is. Circled in yellow.
In the original, the rib line is straight, and the hip underneath is curved. You've got a curved rib line and a straight hip.
The other hip has an odd shading. Circled in yellow. It makes the lighter part of the skirt look fly-away, I guess, and the hip underneath looks straight and small.
In other words, give this woman some hips! I think the way you have it now also leads to goofing up the leg anatomy. The straighter leg should up to the hip bone, but since the hip is reduced, that pushes the thigh lower (the kneecap is lower than the original). This in turn makes the lower leg too short, which makes the legs appear too short, even though they match the original in overall length.
The straight leg looks a bit picasso -does it face the front or the side?
Overall, I like your version of the face, hands, and gun. The lower half of the figure could use some touchups, but I think it only needs small tweaks and it will look great.
My $0.02,
Tourist