Thanks for the rep! I'm sure that we would agree on a lot of non-Admiral match ups. But Admiral match ups make up most of the discussion on the forum. So that's why it might seem like we disagree a lot.
I might have said no to low difficulty, but that's more than no difficulty. Also, I consider Shanks to be Pirate King level. I think that Pre Time Skip Akainu would give most Yonkou mid to high difficulty. I've always listed the Admirals in my top 25 of favorite characters in the series (with Aokiji being in my top 10). Shanks is the only Yonkou that ranks in my top 25 of favorite characters in the series.
Since the thread has been temporarily locked, I just thought that I would clarify an opinion that you thought I have. I do believe that Shanks is significantly more powerful than Pre Time Skip Akainu, but I don't think that he would win with no difficulty.