I also think the first is good and the 2nd is very bad. I suggest you remove the 2nd one as is it so much lower quality than the first.
Also, remove your name from that image. You did not make it, you can not sign it. You downloaded it, and converted it for use in Civ3, but unless you are the orignal render'er of that image it should not be signed. What you have done is a form of plagerism.