Depends on the refresh cycle... the 4th gen birds were new in '93 or so, weren't they? So '95 was pretty fresh and had whatever new features GM was implementing in the mid-90s. '96 was the end of the run for the big RWD cars, so they probably hadn't had any features added since the debut of the whale body style in the late 80s.
Could be the same with the DTS; I don't know when the model changes happened on those.