It's not just me who confuses the two -- I know, sacrilege!  My Honey's mother has worked for Hallmark since the late 1980s - for her, it's not just a job, it's a lifestyle.  She's been collecting ornaments en masse and has 'decorating parties' with her girlfriends where they take turns helping each other 'deck the halls'.  In his mother's case, that's quite helpful, as she puts up 17 trees each year, each with its own theme -- in some cases, blended genres.

Just some of the images from the Star Wars/Star Trek tree: