That's the difference between the 1.2 and the 1.2E? I haven't been able to find specs like that. All I can find is this:
3.0: MOTOR Specialized 1.2 E, custom Rx Street-tuned motor, 250W nominal
4.0: MOTOR Specialized 1.2, custom Rx Street-tuned motor, 250W nominal
on the 2020 Vado page.