REspectfully, it would be difficult to trust someone else's research as opposed to personal and recent experience. Some of these outfits have been operating for many decades, and can have down cycles that are not accurately depicted in the success rates on their websites.
I hunted many years ago with one of these outfits, and would not hunt with them a 2nd time. Not because of harvest success (I did harvest an animal), but because the style of hunt we agreed on was not what I ended up getting. The gap between what was promised and what was delivered on guided AK hunts was a big factor in my opting to go unguided for the past 15 years or so.
Good on you for doing your research, and hope that your future AK hunts deliver the adventure you are seeking. And good luck to the OP, AK hunting is in a challenging period, hope you find and book a memorable hunt.