What is the thing with prefixes ?
From what I understand there is no correlation between input data and output data in cryptography. Two private keys differing only one character should give the output of two completely different public keys and addresses and hash160 values.
Finding a hash160 with similar prefix as different one doesn't indicate that both private keys are from similar range, right ?
Maybe I am wrong ...
You're not wrong. But the people who are, ignore even the two guys who solved the last 5 puzzles, with the 6th on its way. None of those puzzles were solved with prefixes or miracle algorithms, because they don't work. Most of us simply ignore these kind of posts, that doesn't mean we agree with them - maybe just tired to repeat the same thing to the same people over and over again.