Should i start Mewelde Moore (RB - PIT) or Chris Johnson (RB - TEN)? ?

Well i just heard Mewelde Moore is starting for Willie parker week 10 for the Steelers. Not to say he isn't good but i am disappointing because willie parker would have exploded out there. But i do have Mewelde Moore as a RB (PIT) on my roster and i have Chris johnson as a RB (TEN). Which one should i start? Oh yea and if you didn't know too much about the steelers vs colts week 10 match up the Colts have the worst Rushing Defence in the NFL, just to say and With leftwhich in or ben, (Maybe but doubtful, looks like ben is gonna make it) They both will hand it off many times.