What's the difference between OME and using an iso for updates?

Hi,

Question: In terms of the actual updates performed, there is a difference between what OME "finds" and what the latest SUU iso will "find". OME always finds more components to update than the SUU.

1. Why the difference?

2. Is it sufficient to just run the iso file and then call the server "Up to Date".

Thx,

John Bradshaw