The One X and iPhone 4S are complete opposites when it comes to how they look and feel. The biggest differentiating factor here is their size. On one hand, we have the giant One X, and on the other – the very compact (for today's standards) iPhone 4S. For many people out there, the One X might be too bulky to be comfortably held. This feeling is reinforced further by the One X's sharp side edges and excessive width.