You are doing this to attempt to hype Sanji and it’s ridiculous and I’ll tell you why:
1. Where in the manga does it say Queen is a more durable Zoan than King? It doesn’t, the reason you’re saying that is because durability is the only thing Queens fruit gives him. But, all Zoans give you that.
2. The fact that Zoro damaged Kaido let’s us know that he can cut King already. There isn’t a struggle Zoro split Kings mask while getting sent flying King is just strong.
3. How is Killers damage against Kaido debatable? The story says he bypassed his scales what is there to debate?
4. Hell’s memory wouldn’t do anything to Kaido we agree on that. Why are people impressed with Hell’s memory anyway what makes it strong he used it on Wadatsumi who is weak as hell. That move is always brought up but hasn’t proven useful at all. Will Sanji get another power up sure as he should but I don’t care about flashy as much as I do results.
5. AP isn’t everything but we know Killer is fast as well. We also know he was capable of fighting Zoro without his main weapon.
What facts do you have that can dispute any of that?
Queen and King are portrayed as near equals. Both have ancient zoans with very different basic qualities.
King's advantages lay in speed, mobility and sharp attacks from wings/beak. Queen's advantages are his giant frame giving him enhanced durability and strength (can crush people on his level without any resistance with his serpent form if he catches them).
This should be clear and if you think otherwise the burden of proof really would be on you to convince me.
Zoro's issue isn't really "cutting" King, but dealing with his mobility and versatility to get an opportunity to cut him, Oda has set up these matches to be mismatched intentionally. Sanji would find King easier to deal with on those fronts while Zoro would find Queen easier to deal with. I really don't think Killer would be able to do serious damage to Queen significantly easier than pre-upgrade Sanji.
It's debatable because he shrugged it off instantly and would have killed Killer if not for Luffy's intervention with Rhino Schneider.
Hell's memories would do the same as Kama Sonic, and the same as Law/Kidds moves, look flashy, maybe make Kaido scream out in pain, but have no real effect on him.
Killer can't fly, he can't go invisible, Sanji was arguably his level pre upgrade and now he hasn't got impenetrable skin, regeneration and boosted base strength.