I am simply showing you that post ACOA Luffy >> Pre ACOA Luffy. You used pre ACOA Luffy to debate your point.
it doesn't matter if it's post or pre acoa
he actually touched sea stone and had no reaction at all.
in loki's case it was directly said in manga, and condom had a reaction to the seastone too. Like, condom literally told zoro to unlock because he could not touch seastone. he got weak immediately after touching loki's cuffs
loki is an anomaly in that he was able to use lightning which is specifically his df power, while seastoned. So him being able to use haki too is not surprising.
But condom has never been shown to use his df while sea stoned or touching sea stone