Sekai Saikyō no Kenshi
Sekai Saikyō no Otoko
Mihawk had it first, it's WB title that uses his wording, not his.
the parallels were proposital, and we know that WB is not the greatest man. but Mihawk for some reason is the greatest swordsman.
The VIZ put WGS - Dai Kengou here not Saikyo Kenshi, when it says Saikyo Kenshi, because they didn't want to confuse the readers about what the original title is when they first said it was WGS.
Because Oda first time used that same title as
WGS - Dai Kengou in chapter 5, then continue to call that later many times:
Oda used a different wording for the WGS title doesn't change the fact it was used as
WGS first, and later was called WGS - Dai Kengou again many times by Zolo and the others:
WB's title was never called Greatest Man. Thats the difference between the 2.
Mihawk's title first time used in chapter 5: WGS
WB's title first time used: WSM
Oda said Mihawk has more skill than Shanks.
Thats what title is, having greater skills than any other swordsman.
Thats why Roger wasn't WGS despite being the strongest man who uses a sword.
The only reason Oda choose to give Roger's style to Shanks was to show both are above WGS title. As Roger was the strongest man as a sword user but still not WGS.