If two fingerprints are similar, their hashes generated by this function will also be similar. If they are significantly different, their hashes will most likely be significantly different as well, but you can't rely on that. You compare two hashes by counting the bits in which they differ. Normally that would be something like POPCNT(hash1 XOR hash2), which returns a number between 0 and 32. Anthing above 15 means the hashes are completely different.
