Dvd Ram Dvd-5

can some one explain the difference between dvd ram and dvd-5 as there does not appear to be much difference in the % of quality when you compress a movie thank you

Here are 2 sites that explain the difference for you http://www.supermediastore.com/beginner-in-dvd-corner.html and http://www.dvd-supply.com/whisdvdvdvan.html DVD-ram is not good to burn movies to dvd5 is good but need to compress