Answer:
Master Chief without a doubt. While it probably would be a good match, Master Chief has the experience, personalized A.I. to enhanced his reflexes, better armor, and Spartan II's overall had the more effictive augementations. Six on the other hand is a Spartan III. While some select Spartan III's recieved Mjolnir Armor like the Spartan II's they never recieved the same training from 6 years old. They also didn't have as nearly as good of an augmentation process as the II's. Noble Team doesn't even have a smart A.I. (Dot is not a smart A.I.) This is just the bottom line on why Chief would win.
Step-by-step explanation: