Her upper torso should bob a little more in the bottom one. It helps to draw each frame left to right on top of a sine wave for any important part of the body, so you can use the sine wave as a guide for the center of that part. Amplitude = how much bobbing. Nice gallop animation on the legs!
Maybe make her head a little lower in the top one, so she's really sneakying along.
Maybe make her head a little lower in the top one, so she's really sneakying along.