I don't see Yonji facing Yonko Commanders so, while it's with the help of the Raid Suit, it'll be mainly Sanji's work if that is to happen. Ichiji got whooped by Katakuri, Raid Suit didn't stop that. The Raid Suit just improves durability (no harm from Page One and King's nameless beak attack) and speed.
Also, Sanji vs Vergo was 100's of chapters ago. You're acting like Sanji didn't block Daifuku's giant genie's swing with a base kick. Plus he already clashed with King and blocked a kick from him (though King wasn't aware of Sanji, I'll admit). Plus, Sanji has pretty impressive speed feats (kicking Oven, intercepting that Big Mom hit aimed at Reiju, alongside Luffy and the two came from Capone's Big Father). Him being in a position to challenge a Yonko Commander, after getting a power-up, ain't that far-fetched.
I don't even think Sanji will face King (probably Queen instead) but bringing up Vergo now to discredit current Sanji is strange to me. Plus, the Pacifistas that were whooped by Sanji, Zoro and Luffy were an old model. Weren't Vegapunk and Judge partners so how is both of them creating advanced tech a bad thing, especially when Sengoku hyped up the SSG last year.