Chung or Mikell?

Mikell is on the waver wire, but I'd have to drop Chung (or Chancellor) for him.  My gut says to stick with Chung as he gets more Tackles, but Mikell seems to be around the ball a lot.
I'll have to move fast, as our 12 player league wont leave Mikell on the wire for long.
Thanks for any help!

RM

Leave Mikell on the WW. Both players you have rostered are better. Mikell seemed to be playing FS last week way off the line.

Thanks!
My gut tells me Chung is too good to let go, he was such a monster last year!  Gotta learn to deal with off weeks.