They're the same but not the same. Guessing one is a replacement.
Not sure that either illustration quite nails it.
UPDATE: Thank you to Steven Stwalley for these excellent illuminating comments:
"No, David, they have different meanings. The one on the left is the exit for cars with four headlights, the one on the right is the exit for cars with no windows. The rest of the cars have to take the stairs.
"I suspect the second one might be a friend of Hello Kitty as well."