I was talking about using Tools\Difference Tool in Tunerpro, not comparing line by line by hand. This will list the differences between the bins and show what is different that isn't mapped in the xdf.

To compare the straight code you would just open the bin with an hex editor. You'd likely find it completely pointless to do so though. What you're likely meaning is a decompiled version of the bin turned back into assembly language. The problem is that you'll not find that decompiled versions of every different bin file. Typically, there is one or 2 versions floating around that people have worked through and added comments to so they can understand what the code is doing.