Base Sanji didn't show the capability to defeat Judge and we are unaware of Judge's full potential in his suit. I doubt HM would of been enough to perform the job unless he developed more. RS Sanji would prove different.
Sanji defeated Yonji in his RS (The one with super-strength added to it) who was able to beat YVs, so Sanji did have power and is even stronger than Judge, just with Judge he use people to prevent his attack going in and Sanji is dislike how he did things by sacrificing someone instead blocking on it's own. It is heavily implied Sanji would win the fight if it wasn't for that.
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No you said Zoro tried to kill Luffy without explaining any of the context and made it out to be Zoro only trying to kill Luffy was worse that what Sanji did.
Zoro is partially at fault, but Luffy is even worse at fault, he refused to understand Zoro. It's makes Luffy look worse for refusing to believe his crewmate.
What Sanji did was acting on his own Will, he made a choice that SHs were not as important to him. Still made the choice on his own Will
Sanji never from the get go to the point where Judge had the human sacrifice had a real upper hand in the fight
Killing your captain compare to being blackmail and trying to move Luffy away. Of course what Zoro try to do is worse. He did that on his own while Sanji was force to fight, but was holding back as he just wanted Luffy to move away.
What Zoro did is bad compare to Sanji. He couldn't do anything cause his family are there and will inform Big Mom if he start acting how he is. Sanji wasn't acting on his own, your clearly making things up and on headcannon with no proof at all.
Sanji is as he shown to block his spear and was ready to damage him until soldiers come in front of his attack. Judge cheated and it's clear from how it shows Judge wouldn't beat him if the fight continue.