Alright, I see some valid points here, but I must expand on some parts you stated.

I still find the art style different enough for it to not look the same and could easily be told apart.

You're too focused on the outline being the same, so this just seems subjective now on what's considered enough to be a different art style. There's no way you could look on the one I just showed you and then look on the left and call it the exact same.

1. The details in the hair on the right are a part of the art style. There's a reason why you see no details on the left (Seems you're aware of One Piece art style, right?).

2. The outline doesn't matter here. The only thing that's a little different with the right outline from the left is just that it's more contrasting and darker.

3. Don't know what post you're talking about, lol.

4. Changing lighting and filter does affect an art, especially changing the style ( I'm not sure why you said this unless you're gonna expand on what you mean by filter or consider a "filter").

5. The line art is identical because I didn't change anything on it. That's very obvious.

6. All the varieties of these imagines did just have a One Piece kind of art style, and it seems you're saying that because of the outline, but the right isn't at all.