The only details that are for certain right now is that the base dual motor, high capacity centralized battery pack from the EQS will be shared across both models. What motors are used, and what size battery pack, with what range, are all questions that are lingering in the air.
Rumors abound that the Mercedes-AMG version of the EQS will also be fairly brisk, as the base EQS is claimed to have a 4.2 second 0 to 60 MPH time. Both versions of the EQS are rumored to be computer limited to 155 MPH.
There are also mutterings that by the time the AMG version is ready for production, it may have transitioned to a triple motor setup. This would be to counter Tesla’s announced Plaid drivetrain, which is rumored to have over 800 HP and over 1000 lbs-ft of torque.