The LeMirage was modified from the Prestige by adding a full-height windshield and eliminating the roof step. The large side windows are the same size and shape as the windshield but are not interchangeable with the windshield because of differences in tinting and glass composition.
The 102-inch width was introduced in October, 1983 as the XL option which has become the standard model.
Halogen headlights were added in late 1987 and the front and rear light assemblies were restyled, changing the tail lights to columns of rectangular lenses.
The Astral is a variation on the LeMirage which has sightseer windows in the roof.
Information from the Bus World Encyclopedia of Buses - 1988