SBONinetyEight

Hi, I have a 1977 Oldsmobile Ninety Eight Luxury Coupe and I'm looking for a new adjustable passenger side mirror as mine has a fixed mirror glass. I found this place on eBay that sells mirrors for Oldsmobile Delta 88's from the early 80's. My question is: are these mirror assemblies the same? They seem to be the same piece.

Thanks for your help.