Lens seems to work pretty well for its cost. I'm impressed. The bottom one has three blemishes at upper right and one at upper left - not sure if it is camera or lens. They might be in the first too but they fall on the leg so can't be seen.
Maybe play a bit with the low end of the gamma curve to see if you can get some of the details up in the dark areas around the eyes - just a bit contrasty, can sacrifice a little in the midtones to boost the low end?