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.
@retr0id ever since I've had to do this in bulk, the only way for me now is to line them up one below the other. And if there's more than two, I run them through sort | uniq -c | sort