No, whatever is inside MM Harry soul is not the same that is in OG Harry.
WOJ is - and I do not like it, but it is - that what's revealed by soulgaze is almost never changing. If Dresden has potential to become Darth Dresden but also Sir Harry we know - it will be shown in his soul - like Molly soul showed her potential of multiple fates, not just her current state.
So maybe it's not be 100% identical but quite probably 99%.
And I will say it again, I dislike the idea that Harry can change so much, so we better have an scenario where Harry does one or more bad decisions and that makes him vulnerable to dark forces that possess him. Not that he himself become evil.
Nah, if we go for AU it has to be him, and I hope it will be well shown how and why.
Hopefully not some big possessions but small steps, lot of small steps and moral compromises that just turns into a monster after 15 years.
And of course we gonna hate it, and of course Jim's gonna torture us with it.
Jim doesn't seem capable of something like Foundation. I like him, but his latest outing isn't at anywhere near that level. The editors on those magazines would have smacked Jim silly. Twelve Months seems more like, I need to pay off my construction loans, then I need to write a book about Harry dealing with trauma.
Dunno. I think if he wanted to pay off construction loan he would just invent extra book later dealing with some thrilling but not necessarily useful for metaplot shit - rather than delving into new risky territory of book unlike others. That's would be just bad and risky business decision - when Mirror Mirror is concept cool enough - he should write it on his usual speed.
And since Twelve Months sort of answers my overreaching problem with series - which is fact it's series of ultra-fast episodes between which universe is weirdly stagnant around Dresden, and character growth happen almost exclusively within novels, not between them - I think after 20 years Jim could get to simmilar conclusion.
So I take his claims positively - even if I have no idea if he can pool such book off.