Killer is durable enough to tank attacks from Big Mom, comparable to base Zoro in speed, has a dura-negating move that can likely OHKO Sanji and defeated a Supernova captain with ease.
He has a more impressive resume than Sanji as it stands.
It's not even like Sanji wants to lure Queen away or anything, he has the genuine intention of bailing out on the fight and leave Queen be on his rampage putting everyone at risk.
Luckily plot forces Queen to chase him because he wants to see the RS in action...
The difference between Killer and Sanji in high stakes battles :
-One pushed through fighting a hax Supernova for the sake of his partner right after taking part in a bout against two Yonko
-The other literally runs away right after getting the most convenient powerup possible against an...