If you can't tell the difference, then don't sweat it.
FYI, one could have ordered leather without ordering the premium package, but you do get leather with the premium package. If you have three little buttons on your inside rear view mirror, you have the premium package which has leather. Too, if you see ambient lighting (orange glows on the center console and on the door wells) you have premium package. With premium package you get leather.
535i, Monaco, Cream, Light Poplar, Comfort Seats, PP, Nav, ED.