I compared Yoast and AIO about 6-10 months ago and Yoast broke things that AIO didn't, along with some other SEO issues that AIO works on that Yoast didn't. The couple of problems was a HUGE deal for SEO - thus I stick with AIO.

Yoast doesn't quite have it yet. I should do a new comparison shortly.

All I remember is lower-level SEOs would like Yoast better because everything is all there in the plug in but the better SEOs stick with AIO.