My Vote goes for Jwicky,
On the first look Krips looks better, but when i looked longer at Jwicky's sig i noticed more details ..
Krip's sig:
+very nice shadow/light
+very nice flow
-i don't like the text :/
-the render isn't blended in on the left ( though you only notice that when you keep staring at that sig)
-shoulders ain't so good focal points :/
Jwicky's sig:
+Very nice light,
+Very nice flow and i like the text 
- could be more shadowing at the bottom
- the pattern in the top of the sigs doesn't fit so well
Edit: Wtf Jwicky, your text is great Oo
Current Score:
Krip- 1 Jwicky - 1