The fleshy colors make it appear more organic than robotic. Higher contrast will accentuate the hard edges of the armor. The codpiece in the aiming sprite (right one) looks like its at a weird angle (copy pasted from the left sprite). The robot's left upper leg looks very short in both sprites. The pointy feet don't make much sense to me, especially if it's standing on the ground. You could give it more depth by making the far limbs darker.
