Options: items that are pre-installed at build time. Other than fundamental driveline and trim level differences, Nissan doesn't really offer these a-la-carte, they are bundled in "packages." Your options are very clearly laid out in the vehicle brochure and Nissan's website.
Accessories: items that are purchased and/or installed after the vehicle arrives at the dealer. Sometimes dealers pre-install accessories and add them to the vehicle price. Your dealer should have an accessories brochure, or
view them here . Some items that are standard on the SE model are available as accessories on the XE.
Brent