My original top was built by Karman, the replacement top from Chrysler I just installed came from a different manufacturer, Valmet.
HOWEVER, upon researching , I find that Valmet purchased the Karman convertible top business, so they are probably in fact identical with the same tendency toward rear window separation.
If anyone BUYS a replacement top, go with the GAHH top, lifetime warranty on glass separation :

GAHH: Convertible Tops, Auto Interiors, Quality Convertible Tops

or

GAHH: Convertible Tops, Auto Interiors, Quality Convertible Tops