Cena was a great champion before he was pushed to the moon but even then he had a some great storylines and matches.
Reigns on the other hand was pushed to the moon to much before he should of been and it killed his momentum when he became champion.
Cena is one of the all time best on the mic were Reigns is useless on it, he needs Heyman there to talk for him but when Heyman is gone its back to dull Reigns again.