Your Kanter CF is good but please update the hair and beard. And I'm afraid he looks like he's smiling (no offense though :l)
What you can do though is eliminate these "cheek lines (?)" encircled in the pic:

I'm sure you have photoshop and can easily remove them with the clone stamp tool. The lips can also be adjusted (or warped) downward a bit.
The same can be said with Spencer Hawes:

I'll admit, your CF's are REALLY good

, but with just a few tweaks they just might be perfect. And sorry if these nitpicking criticisms are too much to ask for.