A lot of people can get confuse when they see the two different sizes. So lets so that you have a full size comforter should you get a full duvet set? Well it all depends on what you are looking for? To find what you need you have to take a good look at your bedding. Things that you should be looking for are if your mattress is thicker, or if your bed spring is showing than this is probably something that you want to cover up. Some of us have higher beds that leave a wide space between the floor and your bed and others have those beds that actually touch the ground. Then of course there are the canopy lovers who have a bunch of fabric hanging everywhere. By now you should see that there are many different things to think about when choosing the right bedding set.
To put it simply a full/queen would fit both a queen and full bed set, just like a queen/king would fit both a queen and king and so on. The real question you should be asking yourself is do you need a duvet set that will hang or do you prefer something you can tuck in to your bed set and let a bed sham instead. If you are looking for something to hang on your full bed than I would go with a full/queen duvet cover but if you want something to hang on you queen than a queen duvet cover would be the best fit they are large enough that you can let the duvet set hang off the bed. There are many different kinds of bedding that would help if you need something to just throw over your bed and hang eliminating the need for a bed skirt a queen/king bedspread is a perfect example of this, they make making your bed everyday a snap. Hopefully this helps you when determine the difference between the different sizes.