The Warrior is a Predator variant. It doubles the combat payload by having four Hellfires instead of two. If you get a look at the bottom of it, you'll see some of the differences. The biggest difference is the engine. The HFE or Heavy Fuel Engine will run on jet fuel or diesel, which allows common logistics with the rest of the Armys vehicles/aircraft. The engine also produces more horsepower, allowing the additonal Hellfires, and is more fuel efficient, allowing longer range an endurance. It's capable of operation above 25,000 ft with diesel fuel. It's a combat proven UAV, reengineered well for Army use. It will be a division and corps asset, used for recon, commo link, and attack of high-value/time sensitive targets. Smaller and cheaper UAVs will be following along at the lower levels, for use at lower levels. Two thumbs up on this one.
The Army has finally gotten it's act together with UAVs. The Army's UAV situation was similar to the way it's aircraft situation was in the 50's. There were all sorts of offices, branches, units, and what-not playing with UAVs, but no centralized structure at all. Now the Army has a UAV plan and is moving pretty agressively on it. UAV's have logically become part of the Aviation Branch, so these aren't being bought in a vacum separate from other Army air assets. They're all part of an overall plan for coordinated use. Now that the Army finally has a decent UAV plan, you're going to see some real money thrown at UAVs, without the resistance UAVs have met in the USAF for combat missions. The UAV areana is going to be a pretty hot market in the future.