[Newbies] How do I diff two images?

[Clinton Blackmore]

Greetings.

While I've programmed for some time, I am new to Squeak.  I was wondering
how I diff or compare two images that are largely similar (such as, say,
Scratch vs Scratch For Second Life).

In other environments, I'd run the source trees for each project/variation
through a recursive diff tool -- Beyond Compare, Changes.app, Kompare, or
even `diff` from the command line.  How do I do something similar in Squeak?

Cheers,
Clinton Blackmore
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