Human IK A-Pose vs T-Pose?

I will be using HumanIK in Maya to create the controls (I’ll add set driven keys later), But my question is:
Is this default A-Pose okay to animate with HumanIk?

Or do I have to use a T-Pose like this for animating with HumanIK controls?

I don’t know if it will cause problems by not having a T-pose. I also won’t be using mocap.

Thank you.