Both are considered smaller backs. Charles is listed at 5'11" and 199 pounds. Johnson is listed at 5'11" and 200 pounds. The biggest strength for each is their speed.
And both are expected to be the biggest part of their team's offense moving forward.
In a chat on FOXSports.com (via Arrowhead Addict), Adam Caplan reiterated the Charles-Johnson comparison but suggested the difference is that Charles "needs to be in a two-man backfield. CJ doesn't need to share the ball."
Charles would disagree with that. Last year after the Bills game he told us, "I'm a physical player and I can run the ball just like Chris Johnson does." That would insinuate carrying the full load.
I'm not saying Thomas Jones, Charles' backfield mate in 2010, was a bad signing. Not by any means. I'm just saying that, if given the chance, Charles is capable of carrying the full load. He did so for nine games last year on a bum shoulder.
Now that he's healthy, I think it's time to forget the perception that he can't carry the majority of the load.