They kind have to be overall at the same strength, while RHP is smaller and has stronger officers the BP and BMP are about the same number wise so it makes no sense that King is significantly stronger than Kat, else they would litteraly wash the BMP and it goes against the narrative in place.
I think King at the very least would high-diff Katakuri, so not necessarily significantly stronger but a clear difference.
Inferiority by a few officers can be offset by superiority in other fronts. BP is clearly top heavy with a whole bunch of grubs. BMP seems to be have a deeper bench of vet level characters. BMP has like 70 something ministers like Oven, Daifuku, etc. I am not sure how many headliners BP have, but besides the Tobiroppo, none of them seem particularly impressive.
Jack and Pespero are portrayed in the same light given their recent defeat by the Dukes. Given that he wasn’t even part of the original 4 Sweet Commanders, Pespero is BMP’s YC5?
Besides I don’t think theres anything that requires that if BP is 100, the BMP have to be 100 as well. The BMP could be high-diffed by the BP as a whole, the issue is that BP would take enough losses to make them vulnerable to the other Yonkou crews. Deadlocks doesn’t have to mean every crew is equal
Likewise you seem to be judging smoothie when she litteraly has 0 feat, feels like a jump in conclusion tbh. People were doing the same thing when it came to King and his lack of action before he fought Zoro and displayed his current feats.
I want to give Smoothie the benefit of the doubt but I am skeptical that she will ever have a chance to prove herself. Regardless, even in terms of portrayal, Queen and Jozu have is presently narratively as comparable to King and Marco, while Smoothie never had anything like that with Katakuri.
Zoro and Sanji will beat YC1 and YC2 then the next arc will fight stronger foes, I believe there is a difference between YC1 and First mates/ VC, for example Beckman would be a Vice Captain and Shanks partner ( kinda like Rayleigh was to Roger) whereas King is stated to be Kaido's subbordinate, not his partner.
I though the latest VC specifically indicates King as Kaido’s right hand man and lead All-star. Oda also seems to just lump in all the number 2s in the recent Zoro cover. Regardless, seems that we are in agreement that Shiryuu and Sanjis blackbeard pirates opponent gonna surpass their current YC1 and YC2 opponent. So thats at least 2/5 of the YC1 and YC2 that doesn’t fit into the YC1/YC2 powerscale…
At the end of the day I think it sets a baseline, not a ceiling if you will.