Kot: Looks neat. Remove the vent-thing on the right though and make it somewhat like the three in the left, not exactly the same. Try something else. And make the hair go "/\" in stead of "| |".
Cx: It looks quite cool, but there's something wrong about it... Try to make it look badass, like a mean beast that'll rape you. Also, hope you can make cleaner colors and shading, still looks quite unfinished.
Any top-tier artist out there who can blow my mind?