StudioLive CS18AI Rack Control Surface versus the Fader Port 8

I am a new owner of Studio One 3 and its amazing. Now I want to purchase a control surface. What do users feel about the difference between The StudioLive CS18AI Rack Control Surface versus the Fader Port 8

I am an amature and I am happy to save my money to buy the CS18 but the Fader Port 8 may meets my easy needs. Just want to know what you experts think about both of these units and hoping you can help me to decide what I should purchase.