That's Samsung's approach, at least, for its Galaxy Tab. The brand broke three ads for the UK market Monday that each highlight one of those qualities.
The "Lighter" ad imagines a situation in which an elevator is so loaded up that the weight of a cup of coffee, rather than the Samsung Galaxy Tab, makes all the difference. The "Thinner" ad shows a dad camouflaging his Tab with a pencil. In "Faster," a bratty kid complains that his (unnamed) tablet is too slow while a kid sitting next to him is able to enjoy the speed of the Galaxy Tab.
Though the ads don't mention the iPad 2 by name, the Galaxy Tab is lighter and thinner, though it's debatable whether it's faster. (The device's alleged similarity to the iPad is the subject of a dispute in Australia right now.) Motorola also tried to puncture the Apple mystique with a well-received Super Bowl ad, but that hasn't made Xoom a hit.