Why are the specified distances between the EUT and the simulator different for tabletop equipment (0.5m) and floor-standing equipment (1.0m)?

Why are the specified distances between the EUT and the simulator different for tabletop equipment (0.5m) and floor-standing equipment (1.0m)?

We assume the difference in length is due to the size of the EUT equipment.
Floor-standing equipment is likely larger than tabletop equipment, so the cable length is considered to be longer for floor-standing equipment.