Its Match 8 of Round 1! Nova wins with 17 votes beating Green Lantern on 9.
Here is a little information about the fighters.
Hal Jordan Green Lantern:
Each Green Lantern wields a power ring that can generate a variety of effects, sustained purely by the ring wearer’s imagination and strength of will. The greater the user’s willpower, the more effective the ring. The upper limits of the power ring’s abilities remain undefined, and it has been referred to as “the most powerful weapon in the universe” on more than one occasion. The Weaponers of Qward say that every weapon has a weakness and the weakness of a Green Lantern power ring is its wearer, although some argue that the wearer is its strength. Over the years, the rings have been shown capable of accomplishing almost anything within the imagination of the ring bearer.
Other abilities include
Flight, including flight at speeds beyond that of light, although this creates an enormous expenditure of energy and rendering targets invisible.
Richard Rider Nova:
Nova derives his powers from an energy source called the Nova Force which all Nova Corps Centurions wield. Nova’s small measure of the Nova Force gives him superhuman powers including flight, superhuman strength, speed, and durability, as well as the power to absorb energy directed against him and release it as gravimetric pulses and beams, either from specific parts of his body or from his entire body. Nova is a good hand-to-hand combatant. Nova wears a standard Xandarian StarCorps uniform, designed to accommodate his powers without being damaged by them. The uniform is highly resistant to damage, including outer space conditions, and is airtight. In addition, the uniform has a built-in life support function that can sustain Rider under the most extreme environmental conditions, including acting as a life-support suit by locking off the mouth and eyes of the helmet. The helmet contains a radio telescopic sights, night vision sensors, and heat imaging sensors, as well as a visual heads-up display for tracking energy signatures. Among these features are an electromagnetic discharge that can nullify gravity and access to StarGates that allow him to enter hyperspace, where he can move at velocities exceeding the speed of light.