Oh marketing. The more you try to outsmart people, the more you make me dislike the product you're pushing. Why say one weighs 1.44 pounds while the other weighs 17 ounces. By doing that it feels like you're trying to deceive me (which you are). Just say the LCD tablet weighs 23.04 ounces or the e-Inc tablet weighs 1.06 pounds. Using like terms is the only way to make a true comparison, quit the tricks and let the product sell itself.
When you're writing to an international audience and using imperial units, you can sort of expect people to know what miles or pounds are, but you can at least limit it to basic units. Not everyone in the world remembers by heart what is a league, stone, pint or ounce.