Pretty good insight and analysis (it seems they botched daltons INT/YR in the chart but it doesnt come though in the writing)...
We'll compare Rushing Attempts per Season, Rushing Yards per Season, Rushing Yards per Attempt, and Rushing Touchdowns per Season.
Newton absolutely dominates this comparison. He attempts nearly double the rushses, accounting for nearly 3 times the yardage, and touchdowns with the ball in his hands. While he's fairly inline with our variable quarterbacks in the passing game, he's FAR ahead of them in terms of these statistics.
The Panthers know they're playing with fire by next extending Newton this offseason (see Flacco, Baltimore, $120.6M). With that being said, a $14.6M 5th year option for 2015 looks like a steal after the numbers we've formulated in this analysis. With team salary caps expected to rise more in 2015 and 2016, a $24M per year quarterbacks certainly isn't out of the question - even if right now it seems ridiculous.
Spotrac's Prediction: 6 years, $148,800,000Average annual salary $24,800,000, estimated $68,428,000 guaranteed