We got a statement from a Chevrolet representative tonight regarding the visualizer leak:

They said, "Looks like the holidays came early for a few astute Corvette fans. Stay tuned for more."

The most significant photo from today that confirms the hybrid powertrain.
It's the Regen on Demand or Regenerative Braking button that captures energy from braking and recharges the batteries.
Unfortunately, that other button is an Auto Start Stop Button

The button under Z-mode is "Adaptive Cruise Control" button according to Chevy website

Adaptive Cruise Control can automatically maintain a driver-selected gap time from the detected vehicle you’re following while you steer.
This feature reduces the need to frequently brake and accelerate when you’re driving