Some railroad companies considered the short hood the forward part of the locomotive. Other railroad companies considered the long hood the forward part of the locomotive. Hence, the differences you see.
To make a long story very short. A railroad company that ran long hood forward was sued for negligence. It was argued that running long hood forward impaired the vision of the engineer which resulted in an accident. The railroad company lost the lawsuit to the tune in excess of $10 million. Now all rail companies run the short hood forward.