1. This image could benefit from a couple of extra shades, or some palette adjustment. I suggest monochromatic, and pull the hair back to a closer shade to skin, or some darkening of hair tone anyway, along with desaturation. The lighter suit color also needs desaturation. looks like the actual pixels need tidying here and there. needs more work on it before any other c&c i'd guess.
2. This is more like it. The face shading is good, needs some work around the neck. The hair looks post-applied... doesn't seem to merge with the image in anyway. Shadowing from the hair will help this. I think you tried to applied too much detail to the hair, you find you should block in the major areas of lighting for hair. Treat it almost as non shadowing material, using highlights to build volume, which is a no-no usually. After this is done, you can extend small sections of highlights and shade following the direction of hair to add the texture. Keep in mind that usually separation of hair or major tonal variety is only reason you will see this in a big way, so don't do too much. You can control the type of hair by the length and direction of the added detail. Good luck, keep at it.