IME the New DA elite and the Neptune Apex will both do exactly the same thing for you.
There are a couple pros(or cons) to each unit depending on what your needs are.
AFAIK noone uses X10's anymore as a primary outlet source since they are remote and in some cases undependable.
The DA has two, four outlet strips, the Apex has a single eight outlet strip. They are both expandable up to near 70 something outlets if needed.
They both have temp, Ph standard and ORP capability
They both have internet accessibility. AS stated above, the Apex comes standard with internet built in and the DA requires an accessory NET module.
They can both turn off lights in case of too high of temps, control reactors and all of the other wonderful things whole tank controllers do.
The Apex has the programming built right into it including a few fail safes and AFAIK the DA needs to be programmed much like the older Neptunes.
Im not sure if either unit is capable of 240V switches.
Im sure there are things Ive missed but all in all, you cant go wrong with either choice.