+1  A: 

Binaries are likely to contain at least different time-stamps. So, no, two subsequent builds from the same codebase will very likely produce different binaries. Functionally same, most probably same size and even same code, but md5 sums wouldn't match.

Dmitry
+1  A: 

What you're trying to prove is that the two are functionally equivalent so you'll need to review each of the changes in the binary file using a binary diff utility. This will be a manual verification but if you find that the diffs are small in nature and timestamp related as Dmitry pointed out, then you can make the claim.

Noah Campbell