That depends on the Kay. Englehardt continued many of the practices of Kay's late-'60s, production, including heavier finishes, and trimmed down some, such as eliminating the outer linings. Quality woods were getting harder to source by the '70s, so Engles have Indian rosewood rather than the Brazilian rosewood of earlier Kay production, and generally less nice body veneers. Other than that sort of detail they are essentially the same instrument, coming from the same molds, cut on the same jigs using the same practices by many of the same workers in the early Englehardt days, and with the same design issues. As I've written on this thread many times, I'm sure, what matters is the setup. With a good professional setup an Engle can perform as well as any well setup Kay, and it'll be cheaper to buy.
