From the website:

> Matches similar lines within a changed block to better show changed lines that are adjacent to added/removed lines.

From my work with both meld and kdiff3, I don't think either of these do this or do this very well.

Among its less visible advantages, it has a lot of ways to resolve tricky diffs, which comes in handy sometimes. Like manually aligning lines, and applying search/replace filters. Try the built in tutorial to see some of it.

But the main advantage is that it presents diffs the way I like it, naturally since I wrote it ;-)