If you believe the people that managed to be at Greentree, Mark was the only one that didn’t think Williams was the best
JHall, I could be wrong, but my guess is that Richt was more about a precise, unvaried, sequence of moves and was very systematic as to how his QB's followed the process of looks in a more strict sequence.
We heard Richt say something about Jarren didn't know where the receivers were - but would manage to hit a receiver anyway -
That tells me Jarren was maybe less "structured" but more aware of who was open than who his first target was supposed to be according to the play. And he was quick enough to analyse where he should throw it - and not necessarily good at following Richt's firm sequence.
And if you didn't do everything exactly like Richt instructed - in the exact same sequence every time - you weren't going to play for him - as Richt was about structure, a set sequence - which we saw in his play calling - no taking advantage of what the defense was doing.
Jarren would possibly be more of a gunslinger - as he can process all these moving parts more quickly - and not necessarily need to run through this highly structured sequence Richt demanded.
Our past QB's that were really good - of course they knew the play and maybe their first target - but they also could and would throw to open receivers as they saw them.
Rather than go through the progressions, #1, #2, #3 etc., in sequence - if they saw #3 or #4 had busted free - that's who they'd hit.
But I think Richt was more demanding that they run through each one in sequence - and that's why our QB's were more ineffective - as they didn't have as much freedom to just hit the open receiver that popped open.
Then again - I don't know diddly squat - and would leave some of that for others to think about - such as yourself.