Here is another one that seemed pretty even
no prep , in character , standard gear / wear , fight to the death or KO
Actually mihawk's title only means he beat the previous best. If you didn't realize swordsman are now trying to challenge mihawk to become the best. Much like how vista challenged him but he didn't see that much interested in taking the title so much as fighting mihawk.
No it doesn't lol. It means he's acknowledged as the World Greatest Swordsman. There may not have been a previous best, that's just an assumption in the same way that there may not have been a previous Pirate King. His title could have come about just through urban legend, because he was an unbeaten swordsman or he won his title in a tournament a long time ago. There's no way to determine how he obtained his title.