According to WordPress.org, It's faster and less cluttered, and includes dashboard home pages has a series of widgets.
Other features include Multi-file uploads, JPEG EXIF data extraction, plugin-free tag management, and concurrent editing protection for multi-author blogs. And more.
According to some [movabletype.com] the best upgrade path for WordPress is MovableType. ;)
lammert
1:32 am on Apr 13, 2008 (gmt 0)
The best update for WordPress ever was the update in their policy to not create a new version every few months and abandon the previous ones, but to continue support for their 2.0 branch for a minimum period of 5 years. I guess I will let other people upgrade to the 2.5 series, I personally will wait for the 2.0.12 which will be released soon :)