How do you diff a directory for only files of a specific type?

Question

I have a question about the diff command if I want a recursive directory diff but only for a specific file type, how to do that?

I tried using the exclude option but can

Answer 1

You can also use find with -exec to call diff:

cd /destination/dir/1
find . -name *.xml -exec diff {} /destination/dir/2/{} \;