The first - I see that you like cartoonish renders, but it's not going to work out if you'll have only cartoonish renders inside your signatures. Come on, they look very stupid.
Other than that, very good background and good border. The text's font is a bit similar to the rest you use in your signatures. 7/10, 3 points minus only because of the lame render...
The second - I love it a lot, it's much better than the first one. Good background, awesome violent-styled render, and the text matches. The only thing is that the border is too rough, you should've set it to chiseled and make it blood red. Very good, 9.5/10.