It is true; every one of us needs some kind of cover for comfortable sleep. Covering yourself is an essential irrespective of seasonal variations. The only thing you might do is to vary the densities of your covers seasonally. Comforters and blankets are all tailored to provide warmth and some bit of security. However, after knowing what suits you, you will go for your most preferred choice.
When comparisons are made, comforters are seen to provide more warmth than regular blankets. Comforters are usually multi-layered while blankets are single layered. Besides having multiple layers, the filling material in the comforter is a perfect insulator. For elementary physics, insulation properties are solely responsible for warmth in your beddings.
The kind of bedding you use might be responsible for allergic reactions experienced. Considering a comforter, the fluffy material that makes the comforter warmer also traps lots of dust in it. With a comforter allergy sufferers will always find themselves sneezing. Instead, if you’ve got an allergy, go for the open weaved cotton blankets that trap less dust.
This should also be a major consideration. For living in places with seasonal variations in weather, a change in the blanket or comforter you use is mandatory. Owing to their thick layers, comforters will definitely be difficult to store than blankets. Blankets, being relatively thin, will occupy less closet space.
These are just but a number of considerations made. Only by considering what affects you, you will be able to make the right selection.