When you visually compare two hashes, how many digits do you check?

The strings hashed below are "retr0id_18b1f814a8e2d9c4fb9c" and "retr0id_1253dea672ebfa240e94", if you want to check for yourself.
@[email protected] I caught it from the front, my mind merged the whole 22590 cluster into one from the first one, and it ended up being 2258 on the other side

I think you could try to generate hashes such that the first few "blocks" that the mind segments the hash into match though, but need to get at least a heuristic on how those blocks would be segmented like.