I agree that it doesn't make sense for one to be longer. It also doesn't make sense for them to work differently. Maybe some pictures would help.
Edit: We have had issues where a piece of plastic has broken off of the charging port and gotten stuck in the plug. The result is a plug that only works on the car that the broken piece fits into. Once you dig the piece out, everything is fine again. In that case, the plug doesn't fit in at all.