It's important to understand that the Advatek and the Showjockey are fundamentally different products. They can both control individual addressable LEDs via DMX, but what type of LED they control is very different.
I think the first question you need to answer for yourself is do you want to use DMX LED tubes (ie out of the box, premade lights, mounted in an enclosure with a diffuser, and with their own power supply and DMX inputs), or do you want to control LED pixel strips (blank strips with LEDs with nothing more than 3 or 4 wires coming out of them).
In other words, this or this?
Once you've decided on that, we can help you choose the right controller for it.