Nope. Stop the cap. Enma is a powerup by virtue of its Haki training. Everything else is your headcanon when the only tangible metric we have to rank swords didn't change.
I guess every Warlord have the exact same level.
First Enma is a cursed blade they are stated to be stronger.
Second Enma have is own gimmick which require to be overcome like most of sword Zoro got till now.
Why will Oda put a gimmick on an equal sword? Training ? Why this training was close to be offpaneled ? Why this training had 1 panel and Enma 20+ just for his presentation ?
Stop the cap Enma is a PU itself.
All finishers are not the same.
Ashura is a powerup. Rasengan is a powerup. KKG isn't.
Like all skills aren't the same.
Zoro's new skill isn't one
Foxfire style is one.
You can't nitpick.
Skywalk and firefox styles are not powerups - both are very situational abilities which are useful at times and just a party trick otherwise
A power-up don't need to be useful every time.
Most of OP characters have fire based attacks.
Kaido, Big Mom for the Younko
King who is Zoro's current opponents and so on...
Moreover it's like saying upgrading Rumble ball wasn't a PU for Chopper because he can't use it every time.
Or Sulong isn't one because you need to wait 2weeks to use it.
Not everything a character learns from another character is a powerup. That is not what a powerup is. A powerup is anything which makes a character stronger. Firefox style doesn't, it is just another tool in his kit. If Oda intended for it to be a proper powerup, he would've written it as a huge thing and hyped it up across multiple chapters. He offscreened it entirely. That alone shows how irrelevant it is. You are the only retard trying to use it to downplay Zoro.
because being able to neg fire based attacks don't make you stronger.
He talked about it in PH and got it on Wa No.
Again you nitpick Zoro got a better ryuo control no hype nor portrayal=PU
Foxfire style hype and portrayal = Not a PU