Question: what is the difference between a kindle fire hd and hdx?
Answer: The Kindle Fire HD (2013) - that's the new version - has a 7-inch 1280 x 800 (216ppi) display, whilst the Fire HD 8.9-inch has a 1920 x 1200 (254ppi) display. Naturally, the higher pixel density displays of the HDX will give you more detail, with the 8.9-inch HDX looking like the real star in the pack.