Hmm. I'd probably still prefer Powell here.
He's the more talented (at this point) of the two backs likely to see significant time for the Jets. And whether it's by run or reception, the stats still add up just the same. Not getting the point per reception stings, but it's not like you're getting a point per carry either.
I'm really concerned about relying on that CAR backfield at all. Barring an injury, I can see Stewart and McCaffrey really weighing the other's fantasy value down on a weekly basis because I'd expect neither to emerge as a true workhorse back. And in any event, even as the presumed goal line back, Stewart still has to contend with Cam's siphoning off some of the bunny TDs.