There are of course huge difference between ebook readers and the iPhone which can be used to read ebooks. What is interesting is some of the issues carry over regardless of whether or not you use a single purpose device or a multi-purpose device.
Let’s start by by side-by-side comparison on the Sony Reader and Kindle
For a tabular spec comparison and more…
See Kindle and ebook reader notes on the PALINET Leadership Network (free, and you don’t need to be a PALINET, SOLINET or Lyrasis member library or user).