At the game I was frustrated when that sweep play wouldn't work. It wasn't until at home watching on tv, I noticed that play didn't work nearly as well for Stuart as AA. AA was willing to run backwards 5 yds to get 10 yds, while it appeared Stuart ran to where the play was supposed to go. I don't know if it was instincts, experience, or coaching, telling him running backwards is bad, but it worked for AA a few times, at least once it did not. I did also notice times when ACS wasn't fully carrying out his fake after the handoff, in part I think that was to save that for later. I also think part of it was ACS was on the field in the action and could tell when the fake was over & they were pursuing the ball, while it isn't evident in the stands as soon.
With AA maybe it was because he had success early, but he just seemed to have more confidence or a better feel for how to get more yards, kind of like ACS feel for when the pocket is breaking down and when to get out of there. AA had a great game and easily could have been MWP if not for ACS fourth qtr & second OT.
In my weak analysis from watching this season, Stuart has been shown the ability to go full speed where the hole is supposed to be with faith it will be there and AA is more patient and reads the plays more. So depending on the type and style of defense your playing, one approach will generally work better one week then the other may work better the next week/series/play/whatever. 2 different styles and AA's worked better against Fresno St, thats it.