As you might have guessed from the names, what you pay mostly dictates the screen quality. The HD model is frugal, with a 1,280 x 800 display and a modest 1.3GHz quad-core MediaTek processor. Splurge on the full HD version and you'll get both a sharper 1,920 x 1,200 panel and a speedier 1.5GHz chip. Neither is especially powerful between their 2GB of RAM, 16GB of expandable storage, rear 8-megapixel camera and front 5-megapixel cam. However, they might still scratch the itch if you crave something Linux-based besides Android -- just be ready to wait until the second week of April to get yours.