Suppose that a transfer function bandwidth is 1 rads and we

Suppose that a transfer function bandwidth is 1 rad/s and we choose to discretize it with T = 0.1s. This is a reasonable choice for the Forward Euler Transformation. This is a reasonable choice for the ZOH equivalence. This is not a reasonable choice. This is a reasonable choice regardless of the transformation used. We need more information to decide in any of the cases.

This is the reason choice of ZOH equivalence