Q: Road Warrior versus a flow-formed wheel, which is tougher?

Both beat cast, but they are not equal. Flow-formed wheels spin and stretch a cast barrel to strengthen the rim, which is a real improvement for the money. A fully forged monoblock like the Road Warrior is pressed from solid billet, giving the highest strength and the load rating that supports the lifetime structural guarantee. If ultimate durability is the goal, forged wins. If budget rules, flow-formed is a reasonable step.