Dio and Caracala - The Differences in Accounts

Dio says that a famous seer who has this vision of caracala's death being caused by macrinus and comes to rome to report it. Rodian says that the letters are all sent to caracala, but that caracala is about to engage in a chariot race,. And so he then hands the letters to maquinus. In dio, julianus letter reaches macrinus first, while the other letter is laid at antioch. So Macrinus knows he is in danger.