That's easy, if they were both in the same game created by bungie the chief hands down. If they were in the same movie, the chief hands down. But compare what a guardian can do in a game compared to what the chief can do in a game ... of course a guardians going to win. But if you're making this comparison then you must be a halo fan and if you are indeed a halo fan then you should know better than to make this comparison.