Well let me ask you this then.
Gear 4 Attacks > Gear 3 attacks right.
Gear 3 attacks > Gear 3 attacks.
Similarly
Ifrit Jambe > Diable jambe
Diable Jambe > Base Sanji
Similarly
KoH > Ashura
Ashura > Secret style attacks
Secret style attacks > Three sword style
Sanji is using his lastest powers and Zoro and luffy are not.
Gear 4 Attacks > Gear 3 attacks right.
Gear 3 attacks > Gear 3 attacks.
Similarly
Ifrit Jambe > Diable jambe
Diable Jambe > Base Sanji
Similarly
KoH > Ashura
Ashura > Secret style attacks
Secret style attacks > Three sword style
Sanji is using his lastest powers and Zoro and luffy are not.
I mean if he used Diable Jambe here after Nami was screaming and he was telling he would kill the cat that would have been also off. Oda literally just wanted to call-back to the Alabasta panel and had them do the same moves ... i am sure he did not put as much thought into this then this thread is.