TP will compare files and display differences, but these are not easy to read if there are a lot of them.
It would be nice to have a visual display similar to Visual SourceSafe showing added/deleted/changed lines from the two files side by side in a split window. Moving in either file, would also move to the same/similar place in the other, etc, etc.
File Differences
Moderators: AmigoJack, bbadmin, helios, Bob Hansen, MudGuard
Use ExamDiff or ExamDiff Pro (http://www.prestosoft.com)
Examdiff was my favourite, but now i'm in love with the aptly named Beyond Compare