yes i can also see on number two the random cutoff of the brush you used for light.
thye are VNice but you need to take more precision with the sigs. the second looks like it didnt turn out the way you planned, and the first has a nice flow but its interrupted by the way the render you used for a bg, it has very carefull 3d curves and stuff. so the bg is the depth, but it completely doesnt fit with where the rener is. and the lens flare behind the render seems to just brighten the render from most of the sig