What are the advantages and disadvantages of CD Rw and DVD rw?

Well, that depends because their are different advantages and disadvantages to a certain type of a DVD. So, instead I am going to type the advantages and disadvantagesfor the most common DVD. Well they work better and are faster and also have advances in technology. The disadvantages are that it can be expensive to buy a DVD player. Also they tend to break more easily. So, those are the advantages and disadvantages of a DVD. If their are more advantages or disadvantages please edit this!