You can't comprehend a simple saying like "pound for pound"?
It means that Aramaki has more
quality feats from
small pool that he showed than Kaido for example who has large pool because he had extended fights.
For example:
Kaido was getting his ass kicked vs scabbards for like 5 chapters straight, bleeding everywhere and even knocked out
He had to use bunch of his arsenal of attacks to fight scabbards.
Meanwhile Aramaki while toying with them
easily took care of them
without getting hurt, and he did that in
couple of pages while Scabbards call him basically
invincible
Also you are illiterate bozo twisting Aramaki's words about not coming to Wano because of Kaido.
Kaido did not come to Marineford because of Shanks and he never set foot to WCI because of Big Mom and was scared shitless when she was coming to Wano.
Kaido was not Aramaki's target nor did he care to pick a fight with him. He just wanted to bring Luffy's head to Akainu and make him happy.