[PD] diffing .pd files

Does anyone have a method for diffing .pd files that produces useful
results? Basically, I don't think that pixel coordinates are important
if they change (only if it changes order of execution), and usually
when I diff a .pd file, almost everything has changed because of the
coords.

I find adding this makes it more helpful: "cvs diff patch.pd | grep -v connect | cut -d ' ' -f 1,3,6-99" but I am
wondering whether anyone else has done anything along these lines.
Ideally, I would love to see a visual diff for Pd.

.hc

Man has survived hitherto because he was too ignorant to know how to
realize his wishes. Now that he can realize them, he must either change them, or perish. -William Carlos Williams