>>That doesn't look so simple to me. For a start, how would you define "% difference"? Pressumably, different programmers will come up with radically different definitions.
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>I was hoping for a tool that is simple to use. As I have since discovered the problem is much more complex than I had first supposed.
What is the use of a "percentage difference" in the first place? Usually you want to know whether the files are identical or not; if they are not, you will have to do lots of manual comparisons (a tool that shows differences can help here), to see which version you will keep (or parts of both versions).
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)
