I can't find nothing wrong with the vector sig. I love it. And your other one is good too. Both of them are great.
that render looks great, and i like the coloring, but i don't like the grunge that much with the render, 8/10
The Wolverine sig is nice, and the second one would suck without the render, but you did a good job making the pervs on the site fall in love with big jugs lol
Top i dont like the color style. it seems strange, to smooth i think. 7/10 Bottom, nice colors, nice bg, nice and simple good look. 8.5/10 dun like the text all that much
1st - color is a little bland with certain parts too heavy. bg is not very interesting. 7/10 2nd - much more interesting. better text, color, brushing. 7.7/10
8/10 Very nice backgrounds, meh for the renders, but you only have ONE color! You gotta mix it up man, that is what makes sigs original and unique.