Who is more powerful: Superman or Green Lantern?

Superman wins. He was the only one in the Justice League who was able to go one on one with Doomsday. In Infinite Crisis, he was the one who manhandled Antimonitor, a being that eats universes for breakfast. His greatest feats included warping reality and space/time just by punching (PC/Prime Supes) and stopping a conflict in another galaxy in an instant, while in a conversation with Lois without her realizing he even left. Heck, PC Superman was sneezing out a Solar System. The only people who could really handle Superman are the Guardians themselves. A whole company of Green Lantern couldn't take him out. Remember Superman Prime? He obliterated them all.