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EDelta is a fast (linear time) XDelta-style binary differ, but optimized for executables that have a very systematic way of changing between versions. It has not been thoroughly evaluated so far, but on one example (two versions of Vim) it produces a 30kB delta where XDelta needs 250kB. My personal use for edelta is to quickly deploy Linux kernels from my development-laptop to my test-machines, especially when working over my slow ADSL line at home. I frequently see factor of 100 speedups compared to shipping the whole file.
brew install edelta
This formula has no dependencies.