Iphone Vs Droid X

How does Apple's iPhone 4 compare to Motorola's Droid X and HTC's Droid Incredible, Evo 4G, and Nexus One?

Even as iPhone 4 goes out for delivery, and reservists start lining up at Apple Stores, Motorola, Google, Adobe, and Verizon announced the Droid X, the latest, best Android on the planet.