link g4 plus with AEM wideband canbus vs analog 5v input

AEM wideband uego (30-0300) into to link g4 plus wrx5 ecu, what difference analog 5v output and canbus?

now using analog 5v output connect to link ecu if canbus better that analog 5v maybe will rewire use canbus into to ecu.

Digital communications can ensure accuracy. Analog interfaces can have errors due to electrical noise, mis-calibration, even ground offsets. If you have the choice, the CAN interface is superior.