Star wars wins hands down, everyday, all the time. One reason, the force. A single force user is worth a thousand spartans. A Jedi can use the the force to make an army unbeatable(Kotor). Halo ring? Boom, death star vaporizes. Covenant flag ship? Boom, death star vaparizes, shields and all. Sure the flood might be a problem, oh wait, boom! Death star vaparizes. The galactic empire alone is enough to challenge Halo, add on the sith empire, the galactic republic, hell even the rebel alliance can put up a fight! Snow speeders vs. Scarab? Halo is out number, out gunned, and out matched in this throw down. They got nothing on star wars.