Most homeowners don't know the difference between the various kinds of garage door openers. When the time comes to buy a garage door opener, many homeowners feel a little out of their depth. If you're hoping to buy a new opener for your home, it may become helpful to know the difference between chain drive and belt drive models. These two products operate in much the same way, but perform slightly differently. Knowing the characteristics of each can help you decide which one is for you.