Anyways jokes aside it's no surprise that each Gorosei has their own strengths
Topman: Brute force, durability, COC
Natsujuro: speed, swordmanship
Ju Peter: I dunno what his strength is, maybe blowjob or something
Mars: arial attacks, speed
Saturn: poison, regeneration, unknown hax that can render a YC1 like Sanji immobilized
So it's not an anti feat that Natsujuro takes more damage than Topman.