Need suggestions on comparing file security rights on a large set of files

There are many, many file compare utilities out there and I'm trying to find one that can fill a specific need.

Scenario: During a file server migration, I would to be able to compare directory and file permissions on both sides to show if there are any differences between the two. I've tried AccessEnum from SysInternals but due to the sheer amount of data involved, it isn't providing what I need.

Anyone know of a utility out there that can handle about 2 terabytes of file security compares? I don't care about the file contents in this case, only the security that is 'stamped' on both sides. I am sure I am overlooking a simple solution somewhere but I am drawing a blank.

Any help is most appreciated! Please leave a comment on this entry or shoot me an e-mail.