I like the first one better, the second one is sharper but the sharpness made it too bright. Check out some tutorials on clipping masks, a little bit of brush work around the render and a little in front of it at the bottom of the render to help blend it in a little more would of worked wonders in blending in the render and giving it more depth. There's actually quite a good amount of tutorials here that you can read that will help you improve your depth and learn some new things to make it better as far as depth and lighting goes. You're improving though