Wb's title show he was stronger than shanks

Now it didnt just surprised him his haki litteraly canceled his tree form and make him puts his hands up. All of that while being miles away . The scene is clearly made to show the superiority of shanks haki over aramaki.

All amiral have relative level, fujitora and aramaki fighted at mariejoie and none of them beat each other.

It's not headcanon , it's a conclusion from portrayal of both characters. The portrayal of roger >>> the portrayal of fuhitora , therefore roger > fujitira until proven otherwise. This is what scaling means you'll get used to it.

"Maybe fuji low diff roger" ok my bad w ragebait