Kindle 2 vs. Kindle 1 deathmatch

Fortune's Philip Elmer-DeWitt compares the specs of Amazon's Kindle 2 to the Kindle 1 noting that it's 25% thinner, 20% faster, stores up to 1,500 books, and has 25% better battery life, among other improvements. He also elaborates on Whispersync:

The new Whispersync technology allows users to pause in their reading on, say, a Kindle 1, and pick up where they left off on a Kindle 2 and, eventually, on future wireless devices — a phrase Bezos left tantalizingly vague.

Here's the lowdown on how K2 compares to the K1 (and the iPhone):

• Thinner: 0.36 inches thick, 25% thinner than an iPhone
• Quicker: Turns pages 20% faster
• Longer lasting: 25% increase in battery life
• Better display: 16 shades of gray (was 4)
• Bigger memory: Stores up to 1,500 books
• Bigger vocabulary: Built-in 250,000 dictionary
• Better navigation: With a 5-way joystick
• More vocal: Able to read text aloud in a semi-robotic voice
• Less accident prone: The page-turn buttons are smaller and harder to hit by mistake
• More wired: New Whispersync technology

Tip: Fortune's Apple 2.0