There are three trim levels basically on the 14-16 models
Premium, which is the base without the sunroof, lcd instrument cluster, or safety features or nappa leather,
From there there are two trim packages tech package, which includes all of the safety systems and 19" wheels, and there is the luxury package, which has the LCD instrument cluster, pano sunroof and nappa leather, you can get both packages and this is where things get kind of weird, through the first year of the cadenza in the us you get both packages and add a special free add-on for white nappa leather, this is essentially the limited or sxl package, which in the beginning of the 2014 models was just that both packages with white nappa leather, in the latter half of 2014 and through the 2016 model years there is an SXL package that includes the tech and luxury packages with different wheels and badging along with a USB port in the back seat and I believe a 360 camera, but I'm not positive on the last one