Foobar2000:Components/Binary Comparator (foo bitcompare)
From Hydrogenaudio Knowledgebase
Performs binary comparison between two sets of tracks and reports differences.
This is useful to verify whether different files - typically lossless files - contain exactly the same audio data. The component compares only decoded audio data, presence of tags does not affect the results.
Put two groups of tracks to compare one after another in a playlist, select them and choose "Utils / Bit-Compare Tracks..." from the context menu.