Alastair Maw has posted an excellent, thorough and very useful primer comparing MoveableType to Drupalcomparing MoveableType to Drupal. His survey looks mostly at useability, but also compares the frequent requests Drupal receives from MT users with the current state or the in-development features. If you're thinking of a weblog server and considering Drupal or MT, this is recommended reading.

The survey goes through a feature-by-feature comparison for those things that are common between the two programs but doesn't really address are the 'community plumbing' aspects unique to Drupal. For example, this community document on the subject is best hosted on a Drupal site ...