to me there are some other differences. I have chamberlain, genie, and liftmaster garage door openers and I have installed all three. they are all basically the same. having said that I really like the genie screw drive openers. they are easy to install, basically idiot proof. fewer moving parts I.e. no chain. and much quieter than the others I have used. but for large doors like on my shop, you need an industrial strength opener like my liftmasters. the chamberlain ones work fine, and are cheaper than the others so it depends on what you are looking for. most all of them have rolling codes nowadays and are compatible with the built in controls in most newer cars.