There is an optional passenger side mirror that was available with the driver'* side remote mirror and looks exactly like it. The mirror that PY sent you was the non-remote style. The miirors are supposed to match. A passenger side remote look-a-like is VERY expensive...IF you can find one!
My 64 Bonneville Brougham had a remote and the look-a-like on the passenger side. You see the passenger mirror on more GTO'* than anything. It is not reproduced at this time, but there is talk of trying to do it again.