Theyre in the same class. Kaep is much faster but not by a huge margin. You making it sound like there's no difference. There's a margin in the comparison of their speed. Trust me. Kaep is a more elusive runner also.
I'm not sure how much faster Kaepernick is than Cam, if at all.
I think the major difference is, Cam is very probing when he runs. He follows and waits for his blockers, he surveys the field and he's very shifty, and makes people miss tackles.
Kaep, on the other hand is an RG3 type runner, who likes to run straight ahead at full speed most times, almost at an instant. The only thing is: Kaep is a little bigger than RG3, and doesn't allow his reckless sprints to get him clobbered by defenders as much as RG3.
I know Cam was timed at 4.58 at the Combine. But apparently, he got off to some bad starts. I wouldn't be surprised, if Cam is more like a 4.5 (the way he runs away from defenders), and nonetheless, I think Cam's size, shiftiness, plus speed, makes him a better runner than Kaepernick anyway. Kaep is more a straight ahead, speed runner.
I Think in all phases at this stage (as a QB), Kaepernick is a grade or shade below Cam. However, he benefits not having to do nearly as much (or carrying the burden on his shoulders day in day out, the way Cam does/has to). Just look at the fact that Kaep wasn't even ready to start until 9-10 weeks ago (though he played QB in Div I longer than Cam). Can you imagine if he played for the Panthers in 2011 or 2012 from the start of the season?
He would have been a mess, and wouldn't have been coached up nearly as well to the point where he is now. Think about that? Don't forget, Alex Smith, the career bust, was a highly rated passer for that same successful team, before Kaepernick. So what does that tell you about their coaching and scheme over there? It must be very good, thank you.
Now, imagine Kaep out of that system, and playing somewhere else? He may not even starting, or he'd be struggling if he was.