There are some. Canister vacuums are generally more manueverable and thus better for smaller homes and apartments. They are also physically easier to use as the primary weight of the vacuum is on wheels and pulled and take up less storage space. And they're lighter and easier to lug around in general.
Some canister vacuums are suction vacuums. These canister vacuums do not need electricity.
Bag vacuum cleaners require a bag and this is what catches the dirt that you vacuum up, when the bag gets full, you simply throw it away and replace it. Canister vacuums suck up the dirt into the canister attached to the vacuum. You then detach the canister and dump the dirt out of the canister.
There are stick vacuums, small vacuums, central vacuums, canister vacuums, and upright vacuums. The type of vacuum one would want to purchase depends on what the vacuum is going to be used for.
Canister vacuums are very popular in Europe. The motor and the dust collector are in separate parts of the vacuum cleaner. The great thing about canister vacuums are that one can attach different heads to perform different tasks.
The HOOVER S1361 Canister Vacuum is light and portable and cost around only $30.
The four primary categories of household vacuums are upright, canister, stick, and handheld models
Hoover, Dyson, Bissel, and Dirt Devil all carry canister type vacuums. These brands may be purchased at stores such as Walmart and Kmart, as well as home improvement and retail stores such as Sears.
Most vacuums these days are bagless so it is easy to find one that has this features. Bissell, Dirt Devil, Panasonic, and Dyson all have vacuums that are bagless.
Speaking from experience being an owner and regularly using one, the best brand of canister vacuums is Dyson. The Dyson vacuum cleaner really does a great job removing dirt and lint the first run through.
It is personal preference as to whether or not you choose bagless vacuums over the others. You do save money not having to buy bags, but you also have a litte more of a mess trying to clean out the canister of a bagless vacuum.
Stick vacuums are similar to upright cleaners, but they usually lack a rotating brush and are less adept at cleaning than either canister or uprights. Stick vacuums, though, are usually lightweight, easy to store, and inexpensive
They don't at all. In fact, they're considerably better than bag or canister vacums.