If you're living in a smaller apartment or even a carpeted dorm room it's not really necessary to own a full size vacuum. They both use a ton of energy and take up way too much storage room, Morphy Richards has created a smaller alternative for those small spaces.
I've lived in places where I just had a tiny bit of carpet so a full sized vacuum was absolutely ridiculous but I had one anyway due to lack of exciting choices. If you don't have much of a mess to clean up you can flip a switch, the 'eco switch' for a slightly lighter mode and save a bit of energy.
The little sweeper is being sold for just under $60 or £29.99. Not a bad price and you can keep any hippie friends off of your back and brag about how you're saving the environment.