They both do the same thing, but apart from the name they are two totally different programs.
I've never tried the version from clonedvd.net, but I've heard BAD things from many users about that program. Moreover, it is really expensive ($ 99.95 :Z ).
On the contrary, I am a long time user of Elaborate Bytes' version (Slysoft only 'hosts' ELBY version, which is developed by Olli, who is also member of CDFreaks and gives a lot of free support here), and I can tell you that it is GREAT. In conjunction with AnyDVD from Slysoft, you'll be able to backup everything.
You may want to take a look at the announcement Slysoft offers $10 discount on all its products to CD Freaks visitors.
Regards, and welcome to the forums!