Compared are the Video on Demand Version and the Regular Version on DVD.
1 difference = no length difference
For a video on demand release, NCIS episode 4x24 "Angel of Death" has been altered. No cuts were made but there is some alternate footage at the ending of the episode.
When Bernie snorts blow from Devon's intestines, the Video on Demand Version contains alternate, more harmless footage - further footage of "Very Special Agent Anthony DiNozzi" and Jeanne included.