The two heads are both shading issues. It's a common problem with a number of head models, usually down to the fact that there are UV seams in those areas and thus the mesh is split along those seams, causing hard shaded edges. Attempts to fix the issue are often mixed. A lot depends on the specifics of the particular head model.
I'm not really clear on what you are referring to with Zaalbar. His texture is garbage, but aside from that it looks about on par.
Edit: Here's a smoothed out Trask:
Although he has a bigger problem, namely that his eyelid meshes clip pretty badly. That's probably more effort to fix.
Edit 2: I tried a kind of simplistic fix. Turned off the render flags for the original eyelash trimeshes and weighted the upper edges of the eyesockets to the lash bones without creating any actual new eyelash geometry. It doesn't look as bad as I was expecting, but try it out and see what you think. Extract the attached into your Override folder.
Trask_Head_Smoothing_and_Eyelids_Fix.zip