ROMCompare as a tool originally written to detect slight differences between ROMs. With having people test cutting edge things on their devices it is a handy tool for when problems occur and often makes tracking down the problem simple and fast.

ROMCompare consists of an information dumper that can be sent out to people having issues which runs directly on their device, a 'diff'er the dev can use himself to compare output, and patcher to create a binary the user can run to correct the problem.

This tool is not publicly available.