The Kindle Fire has a glossy screen, so it is harder to read in sunlight than an e-paper Kindle. But it is backlit, so you can read it in the dark; though some people get eyestrain from reading backlit screens.
Most importantly, if you want to do more than read books, the Kindle Fire has color - and apps. That's the main difference.
__________________
_________________
|...............| We live in the nick of times.
| Len 17, Wid 3 |
|_______________| [pics]
|