As for pica being stronger then Vergo I doubt it
Pica trained his df but not really his body u can tell by his fighting style .. He prefers not to get hit which is why his adarment while he has it (tashigi does to) is not that good because he doesn't really train it
Not sure where you got the Pica stronger thing, but i only said that they aren't far from each other like the fanbase wants to believe
Thanks Oda. Didn't know you were among us to spout out baseless claims. There are many devil fruit users in this world who are also good in haki(Luffy, Law, Doflamingo, Akainu, and so on). There is nothing that suggest Pica can't be good in both devil fruit and haki. Newbies learn haki in few months when he is a decade veteran in the new world. There are 2level of armament haki: The invisible for beginners like Tashigi or Boo and the black hardening that more experienced users usually use. With more skills, you can cover your entire body in it. The fact that Pica cannot only use hardening but cover his entire body in it, shows he did train in haki. In the Doflamingo flashbacks, they were regularily going on sea where Pica's devil fruit is useless, so he probably had to make up for this. The simple fact of covering majority of his body in haki had Law saying to Luffy that "He is using too much haki". Pica is one of the two characters in the manga so far who showed the ability to cover their entire body in armament haki. What you stated only goes to show how much people are willing to spout nonsense to suit the agenda.
Vergo on other hand trains his body u can tell ... And how dense his haki is one can tel from how it morphed his body into something way bigger then his normal size....
One of the reason why Vergo is one of the most overrated character in the series, due to this fanfiction. His body doesn't become bigger under haki. It's just that he usually wears a white cloth hiding his biceps. While removing it, we simply see his musculatur easier. Pica can also use that. Vergo's only feat in haki is breaking Smoker's haki, which in itself is featless
Vergo also could fly which (though the cp9 version of air walk if I'm not mistaken) so like Sanji he would be able to easily break through stone....
There is a difference between breaking a piece of stone and breaking a mountain of stone. Neither Vergo nor Sanji displayed this level of destructive capacity. The way simpletons think nowadays you would think that some characters can destroy the entire earth just because it's made of stone. No, the size and volume of the materials matters too
The only thing Vergo truly lacks is versitlity which a guy like pica excels at that's why he was able to prolong his fight with zoro so much ...
He lacks in destructive capacity, defense(golem defense and regenerative statue), evasiveness(his ground travelling is one of the fastest in the manga)
Vergo to me is stronger then pica by feats the ppl he has fought etc... I don't think pica can hold a candle next to vergo
If it suits your agenda, i don't care really. The people Vergo fought were weaker than the people Pica fought except one who is on his level, said one who cut him in half the moment he got his heart back